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-rw-r--r--ChangeLog71
-rw-r--r--contrib/chem/chem.1.man13
-rw-r--r--contrib/eqn2graph/eqn2graph.1.man13
-rw-r--r--contrib/gdiffmk/gdiffmk.1.man13
-rw-r--r--contrib/glilypond/glilypond.1.man13
-rw-r--r--contrib/gperl/gperl.1.man13
-rw-r--r--contrib/gpinyin/gpinyin.1.man13
-rw-r--r--contrib/grap2graph/grap2graph.1.man13
-rw-r--r--contrib/hdtbl/groff_hdtbl.7.man13
-rw-r--r--contrib/mm/groff_mm.7.man13
-rw-r--r--contrib/mm/groff_mmse.7.man13
-rw-r--r--contrib/mm/mmroff.1.man13
-rw-r--r--contrib/mom/groff_mom.7.man13
-rw-r--r--contrib/pdfmark/pdfroff.1.man13
-rw-r--r--contrib/pic2graph/pic2graph.1.man13
-rw-r--r--contrib/rfc1345/groff_rfc1345.7.man13
-rw-r--r--man/groff.7.man13
-rw-r--r--man/groff_char.7.man13
-rw-r--r--man/groff_diff.7.man13
-rw-r--r--man/groff_font.5.man13
-rw-r--r--man/groff_out.5.man13
-rw-r--r--man/groff_tmac.5.man13
-rw-r--r--man/roff.7.man13
-rw-r--r--src/devices/grodvi/grodvi.1.man13
-rw-r--r--src/devices/grohtml/grohtml.1.man13
-rw-r--r--src/devices/grolbp/grolbp.1.man13
-rw-r--r--src/devices/grolj4/grolj4.1.man13
-rw-r--r--src/devices/gropdf/gropdf.1.man13
-rw-r--r--src/devices/gropdf/pdfmom.1.man13
-rw-r--r--src/devices/grops/grops.1.man13
-rw-r--r--src/devices/grotty/grotty.1.man13
-rw-r--r--src/devices/xditview/gxditview.1.man13
-rw-r--r--src/preproc/eqn/eqn.1.man13
-rw-r--r--src/preproc/eqn/neqn.1.man14
-rw-r--r--src/preproc/grn/grn.1.man13
-rw-r--r--src/preproc/pic/pic.1.man13
-rw-r--r--src/preproc/preconv/preconv.1.man13
-rw-r--r--src/preproc/refer/refer.1.man13
-rw-r--r--src/preproc/soelim/soelim.1.man13
-rw-r--r--src/preproc/tbl/tbl.1.man13
-rw-r--r--src/roff/groff/groff.1.man13
-rw-r--r--src/roff/nroff/nroff.1.man13
-rw-r--r--src/roff/troff/troff.1.man13
-rw-r--r--src/utils/addftinfo/addftinfo.1.man13
-rw-r--r--src/utils/afmtodit/afmtodit.1.man13
-rw-r--r--src/utils/grog/grog.1.man13
-rw-r--r--src/utils/hpftodit/hpftodit.1.man13
-rw-r--r--src/utils/indxbib/indxbib.1.man13
-rw-r--r--src/utils/lkbib/lkbib.1.man13
-rw-r--r--src/utils/lookbib/lookbib.1.man13
-rw-r--r--src/utils/pfbtops/pfbtops.1.man13
-rw-r--r--src/utils/tfmtodit/tfmtodit.1.man13
-rw-r--r--src/utils/xtotroff/xtotroff.1.man13
-rw-r--r--tmac/groff_man.7.man.in13
-rw-r--r--tmac/groff_me.7.man13
-rw-r--r--tmac/groff_ms.7.man13
-rw-r--r--tmac/groff_trace.7.man13
-rw-r--r--tmac/groff_www.7.man13
58 files changed, 813 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index ecae94519..1265bc041 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,76 @@
2023-02-03 G. Branden Robinson <g.branden.robinson@gmail.com>
+ [man pages]: Provide page-local fallback definition of new `MR`
+ macro. I didn't think I was going to have to do this, but the
+ premier site on the web for viewing Linux man pages, Michael
+ Kerrisk's man7.org, has been pulling snapshots of the pages
+ themselves without upgrading the underlying macros, and so man
+ page cross references set with `MR` are getting lost in its
+ presentations. (I acknowledge: Ingo Schwarze warned me
+ something like this could happen.) This definition is intended
+ as a stopgap measure only. I want to revert this after groff
+ 1.23 is released and has spread to some reasonable degree.
+
+ * contrib/chem/chem.1.man:
+ * contrib/eqn2graph/eqn2graph.1.man:
+ * contrib/gdiffmk/gdiffmk.1.man:
+ * contrib/glilypond/glilypond.1.man:
+ * contrib/gperl/gperl.1.man:
+ * contrib/gpinyin/gpinyin.1.man:
+ * contrib/grap2graph/grap2graph.1.man:
+ * contrib/hdtbl/groff_hdtbl.7.man:
+ * contrib/mm/groff_mm.7.man:
+ * contrib/mm/groff_mmse.7.man:
+ * contrib/mm/mmroff.1.man:
+ * contrib/mom/groff_mom.7.man:
+ * contrib/pdfmark/pdfroff.1.man:
+ * contrib/pic2graph/pic2graph.1.man:
+ * contrib/rfc1345/groff_rfc1345.7.man:
+ * man/groff.7.man:
+ * man/groff_char.7.man:
+ * man/groff_diff.7.man:
+ * man/groff_font.5.man:
+ * man/groff_out.5.man:
+ * man/groff_tmac.5.man:
+ * man/roff.7.man:
+ * src/devices/grodvi/grodvi.1.man:
+ * src/devices/grohtml/grohtml.1.man:
+ * src/devices/grolbp/grolbp.1.man:
+ * src/devices/grolj4/grolj4.1.man:
+ * src/devices/gropdf/gropdf.1.man:
+ * src/devices/gropdf/pdfmom.1.man:
+ * src/devices/grops/grops.1.man:
+ * src/devices/grotty/grotty.1.man:
+ * src/devices/xditview/gxditview.1.man:
+ * src/preproc/eqn/eqn.1.man:
+ * src/preproc/eqn/neqn.1.man:
+ * src/preproc/grn/grn.1.man:
+ * src/preproc/pic/pic.1.man:
+ * src/preproc/preconv/preconv.1.man:
+ * src/preproc/refer/refer.1.man:
+ * src/preproc/soelim/soelim.1.man:
+ * src/preproc/tbl/tbl.1.man:
+ * src/roff/groff/groff.1.man:
+ * src/roff/nroff/nroff.1.man:
+ * src/roff/troff/troff.1.man:
+ * src/utils/addftinfo/addftinfo.1.man:
+ * src/utils/afmtodit/afmtodit.1.man:
+ * src/utils/grog/grog.1.man:
+ * src/utils/hpftodit/hpftodit.1.man:
+ * src/utils/indxbib/indxbib.1.man:
+ * src/utils/lkbib/lkbib.1.man:
+ * src/utils/lookbib/lookbib.1.man:
+ * src/utils/pfbtops/pfbtops.1.man:
+ * src/utils/tfmtodit/tfmtodit.1.man:
+ * src/utils/xtotroff/xtotroff.1.man:
+ * tmac/groff_man.7.man.in:
+ * tmac/groff_me.7.man:
+ * tmac/groff_ms.7.man:
+ * tmac/groff_trace.7.man:
+ * tmac/groff_www.7.man: Do it.
+
+2023-02-03 G. Branden Robinson <g.branden.robinson@gmail.com>
+
[tbl]: Fix bugs using boxes or vertical rules at table edges on
nroff devices, particularly when combined with region or column
expansion.
diff --git a/contrib/chem/chem.1.man b/contrib/chem/chem.1.man
index 78b55cab6..78efd86e9 100644
--- a/contrib/chem/chem.1.man
+++ b/contrib/chem/chem.1.man
@@ -26,6 +26,19 @@ documents
.do nr *groff_chem_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/eqn2graph/eqn2graph.1.man b/contrib/eqn2graph/eqn2graph.1.man
index 697163fc4..fb8c82593 100644
--- a/contrib/eqn2graph/eqn2graph.1.man
+++ b/contrib/eqn2graph/eqn2graph.1.man
@@ -16,6 +16,19 @@ equation into a cropped image
.do nr *groff_eqn2graph_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/gdiffmk/gdiffmk.1.man b/contrib/gdiffmk/gdiffmk.1.man
index 325b09cc1..4680821c5 100644
--- a/contrib/gdiffmk/gdiffmk.1.man
+++ b/contrib/gdiffmk/gdiffmk.1.man
@@ -33,6 +33,19 @@ files
.do nr *groff_gdiffmk_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/glilypond/glilypond.1.man b/contrib/glilypond/glilypond.1.man
index 6bb5e9941..a41469ad2 100644
--- a/contrib/glilypond/glilypond.1.man
+++ b/contrib/glilypond/glilypond.1.man
@@ -28,6 +28,19 @@ documents
.do nr *groff_glilypond_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/gperl/gperl.1.man b/contrib/gperl/gperl.1.man
index ed8f04264..35643f5d3 100644
--- a/contrib/gperl/gperl.1.man
+++ b/contrib/gperl/gperl.1.man
@@ -26,6 +26,19 @@ documents
.do nr *groff_gperl_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/gpinyin/gpinyin.1.man b/contrib/gpinyin/gpinyin.1.man
index e50d6ab61..e479d8074 100644
--- a/contrib/gpinyin/gpinyin.1.man
+++ b/contrib/gpinyin/gpinyin.1.man
@@ -27,6 +27,19 @@ documents
.do nr *groff_gpinyin_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.\" Local definitions
diff --git a/contrib/grap2graph/grap2graph.1.man b/contrib/grap2graph/grap2graph.1.man
index 7aecc350c..bb5eea760 100644
--- a/contrib/grap2graph/grap2graph.1.man
+++ b/contrib/grap2graph/grap2graph.1.man
@@ -16,6 +16,19 @@ diagram into a cropped image
.do nr *groff_grap2graph_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/hdtbl/groff_hdtbl.7.man b/contrib/hdtbl/groff_hdtbl.7.man
index 315b01a28..af9e15c3e 100644
--- a/contrib/hdtbl/groff_hdtbl.7.man
+++ b/contrib/hdtbl/groff_hdtbl.7.man
@@ -26,6 +26,19 @@ groff_hdtbl \- Heidelberger table macros for GNU
.do nr *groff_groff_hdtbl_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.ig
Some simple formatting macros. Note that we use '.ig' here and not a
diff --git a/contrib/mm/groff_mm.7.man b/contrib/mm/groff_mm.7.man
index 47800f41c..d7f5ab156 100644
--- a/contrib/mm/groff_mm.7.man
+++ b/contrib/mm/groff_mm.7.man
@@ -31,6 +31,19 @@ groff_mm \- memorandum macros for GNU
.do nr *groff_groff_mm_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/mm/groff_mmse.7.man b/contrib/mm/groff_mmse.7.man
index 4e75b621d..605aec81c 100644
--- a/contrib/mm/groff_mmse.7.man
+++ b/contrib/mm/groff_mmse.7.man
@@ -32,6 +32,19 @@ groff_mmse \- svenska \(rqmemorandum\(rq makro f\(:or GNU
.do nr *groff_groff_mmse_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Syntax
diff --git a/contrib/mm/mmroff.1.man b/contrib/mm/mmroff.1.man
index c35b46e38..e47957ce2 100644
--- a/contrib/mm/mmroff.1.man
+++ b/contrib/mm/mmroff.1.man
@@ -31,6 +31,19 @@ macro package
.do nr *groff_mmroff_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/mom/groff_mom.7.man b/contrib/mom/groff_mom.7.man
index a4c2d8639..0b4492358 100644
--- a/contrib/mom/groff_mom.7.man
+++ b/contrib/mom/groff_mom.7.man
@@ -32,6 +32,19 @@ groff_mom \- modern macros for document composition with GNU
.do nr *groff_groff_mom_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.\" Setup
diff --git a/contrib/pdfmark/pdfroff.1.man b/contrib/pdfmark/pdfroff.1.man
index a49fa3909..41ea4f504 100644
--- a/contrib/pdfmark/pdfroff.1.man
+++ b/contrib/pdfmark/pdfroff.1.man
@@ -26,6 +26,19 @@ pdfroff \- construct files in Portable Document Format using
.do nr *groff_pdfroff_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/pic2graph/pic2graph.1.man b/contrib/pic2graph/pic2graph.1.man
index 571a520f2..f65aa88fe 100644
--- a/contrib/pic2graph/pic2graph.1.man
+++ b/contrib/pic2graph/pic2graph.1.man
@@ -16,6 +16,19 @@ diagram into a cropped image
.do nr *groff_pic2graph_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/contrib/rfc1345/groff_rfc1345.7.man b/contrib/rfc1345/groff_rfc1345.7.man
index 9998e1690..c05fef96c 100644
--- a/contrib/rfc1345/groff_rfc1345.7.man
+++ b/contrib/rfc1345/groff_rfc1345.7.man
@@ -35,6 +35,19 @@ groff_rfc1345 \- special character names from RFC 1345 and Vim digraphs
.do nr *groff_groff_rfc1345_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Description
diff --git a/man/groff.7.man b/man/groff.7.man
index 9a14bee2a..ab64f841e 100644
--- a/man/groff.7.man
+++ b/man/groff.7.man
@@ -28,6 +28,19 @@ language reference
.do nr *groff_groff_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.\" Setup
diff --git a/man/groff_char.7.man b/man/groff_char.7.man
index 188fb80d3..a004b8488 100644
--- a/man/groff_char.7.man
+++ b/man/groff_char.7.man
@@ -30,6 +30,19 @@ special character and glyph repertoire
.do nr *groff_groff_char_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Description
diff --git a/man/groff_diff.7.man b/man/groff_diff.7.man
index b520e7129..afece2e70 100644
--- a/man/groff_diff.7.man
+++ b/man/groff_diff.7.man
@@ -29,6 +29,19 @@ and AT&T
.do nr *groff_groff_diff_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.\" Local definitions
diff --git a/man/groff_font.5.man b/man/groff_font.5.man
index a26003ed9..cace1aa32 100644
--- a/man/groff_font.5.man
+++ b/man/groff_font.5.man
@@ -28,6 +28,19 @@ device and font description files
.do nr *groff_groff_font_5_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Description
diff --git a/man/groff_out.5.man b/man/groff_out.5.man
index 65386de45..f31fd3212 100644
--- a/man/groff_out.5.man
+++ b/man/groff_out.5.man
@@ -28,6 +28,19 @@ intermediate output format
.do nr *groff_groff_out_5_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.\" Setup
diff --git a/man/groff_tmac.5.man b/man/groff_tmac.5.man
index 20d1953d0..02dda7888 100644
--- a/man/groff_tmac.5.man
+++ b/man/groff_tmac.5.man
@@ -27,6 +27,19 @@ typesetting system
.do nr *groff_groff_tmac_5_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" TODO: Consider parallelizing with our Texinfo node "Macro Packages".
.\" ====================================================================
diff --git a/man/roff.7.man b/man/roff.7.man
index 9cdff7447..ad1386dad 100644
--- a/man/roff.7.man
+++ b/man/roff.7.man
@@ -31,6 +31,19 @@ typesetting
.do nr *groff_roff_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Description
diff --git a/src/devices/grodvi/grodvi.1.man b/src/devices/grodvi/grodvi.1.man
index 8d7be9e5e..ddd192c0e 100644
--- a/src/devices/grodvi/grodvi.1.man
+++ b/src/devices/grodvi/grodvi.1.man
@@ -31,6 +31,19 @@ output driver for TeX DVI format
.do nr *groff_grodvi_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.ie t .ds tx T\h'-.1667m'\v'.224m'E\v'-.224m'\h'-.125m'X
.el .ds tx TeX
diff --git a/src/devices/grohtml/grohtml.1.man b/src/devices/grohtml/grohtml.1.man
index 4b8828124..32a1e7cfe 100644
--- a/src/devices/grohtml/grohtml.1.man
+++ b/src/devices/grohtml/grohtml.1.man
@@ -31,6 +31,19 @@ output driver for HTML
.do nr *groff_grohtml_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/devices/grolbp/grolbp.1.man b/src/devices/grolbp/grolbp.1.man
index f6ff7a3a0..9d50f0943 100644
--- a/src/devices/grolbp/grolbp.1.man
+++ b/src/devices/grolbp/grolbp.1.man
@@ -36,6 +36,19 @@ output driver for Canon CaPSL printers
.do nr *groff_grolbp_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/devices/grolj4/grolj4.1.man b/src/devices/grolj4/grolj4.1.man
index 847d64451..ab226647a 100644
--- a/src/devices/grolj4/grolj4.1.man
+++ b/src/devices/grolj4/grolj4.1.man
@@ -31,6 +31,19 @@ output driver for HP LaserJet 4 and compatible printers
.do nr *groff_grolj4_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.\" This macro definition is poor style from a portability standpoint,
.\" but it's a good test and demonstration of the standard font
.\" repertoire for the devices where it has any effect at all, and so
diff --git a/src/devices/gropdf/gropdf.1.man b/src/devices/gropdf/gropdf.1.man
index e751e69a1..40f369343 100644
--- a/src/devices/gropdf/gropdf.1.man
+++ b/src/devices/gropdf/gropdf.1.man
@@ -31,6 +31,19 @@ output driver for Portable Document Format
.do nr *groff_gropdf_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" This macro definition is poor style from a portability standpoint,
.\" but it's a good test and demonstration of the standard font
diff --git a/src/devices/gropdf/pdfmom.1.man b/src/devices/gropdf/pdfmom.1.man
index e77aff439..21bc89a47 100644
--- a/src/devices/gropdf/pdfmom.1.man
+++ b/src/devices/gropdf/pdfmom.1.man
@@ -32,6 +32,19 @@ macro package for
.do nr *groff_pdfmom_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/devices/grops/grops.1.man b/src/devices/grops/grops.1.man
index 0280507af..a84615e67 100644
--- a/src/devices/grops/grops.1.man
+++ b/src/devices/grops/grops.1.man
@@ -31,6 +31,19 @@ output driver for PostScript
.do nr *groff_grops_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" This macro definition is poor style from a portability standpoint,
.\" but it's a good test and demonstration of the standard font
diff --git a/src/devices/grotty/grotty.1.man b/src/devices/grotty/grotty.1.man
index b7c429a88..989b371e3 100644
--- a/src/devices/grotty/grotty.1.man
+++ b/src/devices/grotty/grotty.1.man
@@ -31,6 +31,19 @@ output driver for typewriter-like (terminal) devices
.do nr *groff_grotty_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/devices/xditview/gxditview.1.man b/src/devices/xditview/gxditview.1.man
index 5e4646d66..d92880344 100644
--- a/src/devices/xditview/gxditview.1.man
+++ b/src/devices/xditview/gxditview.1.man
@@ -35,6 +35,19 @@ intermediate output files in X11
.do nr *groff_gxditview_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/preproc/eqn/eqn.1.man b/src/preproc/eqn/eqn.1.man
index 98af068a8..9915a5352 100644
--- a/src/preproc/eqn/eqn.1.man
+++ b/src/preproc/eqn/eqn.1.man
@@ -32,6 +32,19 @@ or MathML
.do nr *groff_eqn_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.ie \n(.V<\n(.v \
. ds tx T\h'-.1667m'\v'.224m'E\v'-.224m'\h'-.125m'X
diff --git a/src/preproc/eqn/neqn.1.man b/src/preproc/eqn/neqn.1.man
index dc3cafd6b..cb570fc3d 100644
--- a/src/preproc/eqn/neqn.1.man
+++ b/src/preproc/eqn/neqn.1.man
@@ -25,6 +25,20 @@
.\" instead of in the original English.
.
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
+.
.\" ====================================================================
.SH Synopsis
.\" ====================================================================
diff --git a/src/preproc/grn/grn.1.man b/src/preproc/grn/grn.1.man
index c8d3f9442..7dafd09fb 100644
--- a/src/preproc/grn/grn.1.man
+++ b/src/preproc/grn/grn.1.man
@@ -32,6 +32,19 @@ documents
.do nr *groff_grn_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/preproc/pic/pic.1.man b/src/preproc/pic/pic.1.man
index 838f98d70..7af12f90e 100644
--- a/src/preproc/pic/pic.1.man
+++ b/src/preproc/pic/pic.1.man
@@ -31,6 +31,19 @@ or TeX
.do nr *groff_pic_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.\" Definitions
diff --git a/src/preproc/preconv/preconv.1.man b/src/preproc/preconv/preconv.1.man
index 0e888c567..da167e568 100644
--- a/src/preproc/preconv/preconv.1.man
+++ b/src/preproc/preconv/preconv.1.man
@@ -30,6 +30,19 @@ preconv \- prepare files for typesetting with
.do nr *groff_preconv_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/preproc/refer/refer.1.man b/src/preproc/refer/refer.1.man
index e23b6f974..4aaf4bffc 100644
--- a/src/preproc/refer/refer.1.man
+++ b/src/preproc/refer/refer.1.man
@@ -30,6 +30,19 @@
.do nr *groff_refer_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/preproc/soelim/soelim.1.man b/src/preproc/soelim/soelim.1.man
index 484ce1f60..7514496a1 100644
--- a/src/preproc/soelim/soelim.1.man
+++ b/src/preproc/soelim/soelim.1.man
@@ -31,6 +31,19 @@ or other text files
.\" Save and disable compatibility mode (for, e.g., Solaris 10/11).
.do nr *groff_soelim_1_man_C \n[.cp]
.cp 0
+.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
.\" Man pages are seldom preprocessed with pic(1).
.mso pic.tmac
.
diff --git a/src/preproc/tbl/tbl.1.man b/src/preproc/tbl/tbl.1.man
index 7ffc086ab..ca49f14b9 100644
--- a/src/preproc/tbl/tbl.1.man
+++ b/src/preproc/tbl/tbl.1.man
@@ -32,6 +32,19 @@ documents
.do nr *groff_tbl_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/roff/groff/groff.1.man b/src/roff/groff/groff.1.man
index 1759a6835..462e8e47b 100644
--- a/src/roff/groff/groff.1.man
+++ b/src/roff/groff/groff.1.man
@@ -27,6 +27,19 @@ document formatting system
.do nr *groff_groff_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.\" Define a string for the TeX logo.
.ie t .ds TeX T\h'-.1667m'\v'.224m'E\v'-.224m'\h'-.125m'X
.el .ds TeX TeX
diff --git a/src/roff/nroff/nroff.1.man b/src/roff/nroff/nroff.1.man
index 97c6aace7..8bd6486c1 100644
--- a/src/roff/nroff/nroff.1.man
+++ b/src/roff/nroff/nroff.1.man
@@ -31,6 +31,19 @@ for TTY (terminal) devices
.do nr *groff_nroff_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/roff/troff/troff.1.man b/src/roff/troff/troff.1.man
index 5d7ba9586..68f61ab7f 100644
--- a/src/roff/troff/troff.1.man
+++ b/src/roff/troff/troff.1.man
@@ -28,6 +28,19 @@ typesetter and document formatter
.do nr *groff_troff_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/addftinfo/addftinfo.1.man b/src/utils/addftinfo/addftinfo.1.man
index 3cad99a3c..9b3c24460 100644
--- a/src/utils/addftinfo/addftinfo.1.man
+++ b/src/utils/addftinfo/addftinfo.1.man
@@ -32,6 +32,19 @@ fonts for use with
.do nr *groff_addftinfo_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/afmtodit/afmtodit.1.man b/src/utils/afmtodit/afmtodit.1.man
index 79b18feab..45402f851 100644
--- a/src/utils/afmtodit/afmtodit.1.man
+++ b/src/utils/afmtodit/afmtodit.1.man
@@ -31,6 +31,19 @@ PostScript and PDF output
.do nr *groff_afmtodit_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/grog/grog.1.man b/src/utils/grog/grog.1.man
index abd020604..7f5f4bcab 100644
--- a/src/utils/grog/grog.1.man
+++ b/src/utils/grog/grog.1.man
@@ -28,6 +28,19 @@ command a document requires
.do nr *groff_grog_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/hpftodit/hpftodit.1.man b/src/utils/hpftodit/hpftodit.1.man
index e645beb7b..058d86c60 100644
--- a/src/utils/hpftodit/hpftodit.1.man
+++ b/src/utils/hpftodit/hpftodit.1.man
@@ -32,6 +32,19 @@ and
.do nr *groff_hpftodit_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/indxbib/indxbib.1.man b/src/utils/indxbib/indxbib.1.man
index dd14ac164..dffdee900 100644
--- a/src/utils/indxbib/indxbib.1.man
+++ b/src/utils/indxbib/indxbib.1.man
@@ -29,6 +29,19 @@
.do nr *groff_indxbib_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/lkbib/lkbib.1.man b/src/utils/lkbib/lkbib.1.man
index 6d485729d..1c16d7de9 100644
--- a/src/utils/lkbib/lkbib.1.man
+++ b/src/utils/lkbib/lkbib.1.man
@@ -29,6 +29,19 @@ lkbib \- search bibliographic databases
.do nr *groff_lkbib_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/lookbib/lookbib.1.man b/src/utils/lookbib/lookbib.1.man
index fcbb739d2..d0e24d745 100644
--- a/src/utils/lookbib/lookbib.1.man
+++ b/src/utils/lookbib/lookbib.1.man
@@ -29,6 +29,19 @@
.do nr *groff_lookbib_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/pfbtops/pfbtops.1.man b/src/utils/pfbtops/pfbtops.1.man
index 61314a8b9..c1340fe59 100644
--- a/src/utils/pfbtops/pfbtops.1.man
+++ b/src/utils/pfbtops/pfbtops.1.man
@@ -30,6 +30,19 @@ Font ASCII
.do nr *groff_pfbtops_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/src/utils/tfmtodit/tfmtodit.1.man b/src/utils/tfmtodit/tfmtodit.1.man
index 3bc5ad092..eba2044b8 100644
--- a/src/utils/tfmtodit/tfmtodit.1.man
+++ b/src/utils/tfmtodit/tfmtodit.1.man
@@ -32,6 +32,19 @@ and
.do nr *groff_tfmtodit_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.\" Definitions
diff --git a/src/utils/xtotroff/xtotroff.1.man b/src/utils/xtotroff/xtotroff.1.man
index f598f4896..b842eaf43 100644
--- a/src/utils/xtotroff/xtotroff.1.man
+++ b/src/utils/xtotroff/xtotroff.1.man
@@ -31,6 +31,19 @@ font metrics
.do nr *groff_xtotroff_1_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/tmac/groff_man.7.man.in b/tmac/groff_man.7.man.in
index 69b5551d1..217acfc97 100644
--- a/tmac/groff_man.7.man.in
+++ b/tmac/groff_man.7.man.in
@@ -83,6 +83,19 @@ _endif()dnl
.do nr *groff_groff_man_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/tmac/groff_me.7.man b/tmac/groff_me.7.man
index 8b0e0d834..3966e0cb9 100644
--- a/tmac/groff_me.7.man
+++ b/tmac/groff_me.7.man
@@ -52,6 +52,19 @@ documents
.do nr *groff_groff_me_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/tmac/groff_ms.7.man b/tmac/groff_ms.7.man
index 4fbe8e26c..f9c66c131 100644
--- a/tmac/groff_ms.7.man
+++ b/tmac/groff_ms.7.man
@@ -32,6 +32,19 @@ manuscript macro package for formatting documents
.do nr *groff_groff_ms_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/tmac/groff_trace.7.man b/tmac/groff_trace.7.man
index 45fbed598..7fbfdcc92 100644
--- a/tmac/groff_trace.7.man
+++ b/tmac/groff_trace.7.man
@@ -27,6 +27,19 @@ documents
.do nr *groff_groff_trace_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis
diff --git a/tmac/groff_www.7.man b/tmac/groff_www.7.man
index 4b34d3eef..7dfe0facc 100644
--- a/tmac/groff_www.7.man
+++ b/tmac/groff_www.7.man
@@ -32,6 +32,19 @@ macros for authoring web pages
.do nr *groff_groff_www_7_man_C \n[.cp]
.cp 0
.
+.\" Define fallback for groff 1.23's MR macro if the system lacks it.
+.de @@
+. de MR
+. ie \n(.$=1 \
+. I %\$1
+. el \
+. IR %\$1 (\$2)\$3
+. \\.
+..
+.if \n(.g .if !d MR .@@
+.if !\n(.g .@@
+.rm @@
+.
.
.\" ====================================================================
.SH Synopsis