2003-03-28 Nathanael Nerode <neroden@gcc.gnu.org>

	* configure.in: Clarify comments.
	* configure: Regenerate.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@64990 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 42 insertions, 30 deletions

diff --git a/gcc/configure b/gcc/configure
index 06b4b4eda3d..95f259acebb 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -7399,9 +7399,15 @@ if test -f ../ld/Makefile; then
 	rm -f collect-ld; $symbolic_link ../ld/ld-new$host_exeext collect-ld$host_exeext 2>/dev/null
 fi
 
-# Figure out what assembler we will be using.
+# Identify the assembler which will work hand-in-glove with the newly
+# built GCC, so that we can examine its features.  This is the assembler
+# which will be driven by the driver program.
+#
+# If build != host, and we aren't building gas in-tree, we identify a
+# build->target assembler and hope that it will have the same features
+# as the host->target assembler we'll be using.
 echo $ac_n "checking what assembler to use""... $ac_c" 1>&6
-echo "configure:7405: checking what assembler to use" >&5
+echo "configure:7411: checking what assembler to use" >&5
 in_tree_gas=no
 gcc_cv_as=
 gcc_cv_gas_major_version=
@@ -7502,9 +7508,15 @@ case $in_tree_gas in
     ;;
 esac
 
-# Figure out what linker we will be using.
+# Identify the linker which will work hand-in-glove with the newly
+# built GCC, so that we can examine its features.  This is the linker
+# which will be driven by the driver program.
+#
+# If build != host, and we aren't building gas in-tree, we identify a
+# build->target linker and hope that it will have the same features
+# as the host->target linker we'll be using.
 echo $ac_n "checking what linker to use""... $ac_c" 1>&6
-echo "configure:7508: checking what linker to use" >&5
+echo "configure:7520: checking what linker to use" >&5
 in_tree_ld=no
 gcc_cv_ld=
 gcc_cv_gld_major_version=
@@ -7603,7 +7615,7 @@ esac
 
 # Figure out what nm we will be using.
 echo $ac_n "checking what nm to use""... $ac_c" 1>&6
-echo "configure:7607: checking what nm to use" >&5
+echo "configure:7619: checking what nm to use" >&5
 if test -x nm$host_exeext; then
 	gcc_cv_nm=./nm$host_exeext
 elif test "x$program_prefix" != xNONE; then
@@ -7615,7 +7627,7 @@ echo "$ac_t""$gcc_cv_nm" 1>&6
 
 # Figure out what objdump we will be using.
 echo $ac_n "checking what objdump to use""... $ac_c" 1>&6
-echo "configure:7619: checking what objdump to use" >&5
+echo "configure:7631: checking what objdump to use" >&5
 if test -x objdump$host_exeext; then
 	gcc_cv_objdump=./objdump$host_exeext
 elif test "x$program_prefix" != xNONE; then
@@ -7627,7 +7639,7 @@ echo "$ac_t""$gcc_cv_objdump" 1>&6
 
 # Figure out what assembler alignment features are present.
 echo $ac_n "checking assembler alignment features""... $ac_c" 1>&6
-echo "configure:7631: checking assembler alignment features" >&5
+echo "configure:7643: checking assembler alignment features" >&5
 gcc_cv_as_alignment_features=none
 if test $in_tree_gas = yes; then
   # Gas version 2.6 and later support for .balign and .p2align.
@@ -7688,7 +7700,7 @@ fi
 echo "$ac_t""$gcc_cv_as_alignment_features" 1>&6
 
 echo $ac_n "checking assembler subsection support""... $ac_c" 1>&6
-echo "configure:7692: checking assembler subsection support" >&5
+echo "configure:7704: checking assembler subsection support" >&5
 gcc_cv_as_subsections=no
 if test $in_tree_gas = yes ; then
    if test $gcc_cv_gas_major_version -eq 2 \
@@ -7737,7 +7749,7 @@ fi
 echo "$ac_t""$gcc_cv_as_subsections" 1>&6
 
 echo $ac_n "checking assembler weak support""... $ac_c" 1>&6
-echo "configure:7741: checking assembler weak support" >&5
+echo "configure:7753: checking assembler weak support" >&5
 gcc_cv_as_weak=no
 if test $in_tree_gas = yes ; then
    if test $gcc_cv_gas_major_version -eq 2 \
@@ -7767,7 +7779,7 @@ fi
 echo "$ac_t""$gcc_cv_as_weak" 1>&6
 
 echo $ac_n "checking assembler hidden support""... $ac_c" 1>&6
-echo "configure:7771: checking assembler hidden support" >&5
+echo "configure:7783: checking assembler hidden support" >&5
 gcc_cv_as_hidden=no
 if test $in_tree_gas = yes ; then
    if test $gcc_cv_gas_major_version -eq 2 \
@@ -7848,7 +7860,7 @@ esac
 
 
 echo $ac_n "checking assembler leb128 support""... $ac_c" 1>&6
-echo "configure:7852: checking assembler leb128 support" >&5
+echo "configure:7864: checking assembler leb128 support" >&5
 gcc_cv_as_leb128=no
 if test $in_tree_gas = yes ; then
    if test $gcc_cv_gas_major_version -eq 2 \
@@ -7902,7 +7914,7 @@ fi
 echo "$ac_t""$gcc_cv_as_leb128" 1>&6
 
 echo $ac_n "checking assembler eh_frame optimization""... $ac_c" 1>&6
-echo "configure:7906: checking assembler eh_frame optimization" >&5
+echo "configure:7918: checking assembler eh_frame optimization" >&5
 gcc_cv_as_eh_frame=no
 if test $in_tree_gas = yes ; then
    if test $gcc_cv_gas_major_version -eq 2 \
@@ -7992,7 +8004,7 @@ fi
 echo "$ac_t""$gcc_cv_as_eh_frame" 1>&6
 
 echo $ac_n "checking assembler section merging support""... $ac_c" 1>&6
-echo "configure:7996: checking assembler section merging support" >&5
+echo "configure:8008: checking assembler section merging support" >&5
 gcc_cv_as_shf_merge=no
 if test $in_tree_gas = yes ; then
    if test $gcc_cv_gas_major_version -eq 2 \
@@ -8024,7 +8036,7 @@ fi
 echo "$ac_t""$gcc_cv_as_shf_merge" 1>&6
 
 echo $ac_n "checking assembler thread-local storage support""... $ac_c" 1>&6
-echo "configure:8028: checking assembler thread-local storage support" >&5
+echo "configure:8040: checking assembler thread-local storage support" >&5
 gcc_cv_as_tls=no
 conftest_s=
 tls_first_major=
@@ -8171,7 +8183,7 @@ case "$target" in
   # All TARGET_ABI_OSF targets.
   alpha*-*-osf* | alpha*-*-linux* | alpha*-*-*bsd*)
     echo $ac_n "checking assembler supports explicit relocations""... $ac_c" 1>&6
-echo "configure:8175: checking assembler supports explicit relocations" >&5
+echo "configure:8187: checking assembler supports explicit relocations" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_explicit_relocs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8224,7 +8236,7 @@ EOF
     ;;
   sparc*-*-*)
     echo $ac_n "checking assembler .register pseudo-op support""... $ac_c" 1>&6
-echo "configure:8228: checking assembler .register pseudo-op support" >&5
+echo "configure:8240: checking assembler .register pseudo-op support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_register_pseudo_op'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8252,7 +8264,7 @@ EOF
     fi
 
     echo $ac_n "checking assembler supports -relax""... $ac_c" 1>&6
-echo "configure:8256: checking assembler supports -relax" >&5
+echo "configure:8268: checking assembler supports -relax" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_relax_opt'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8280,7 +8292,7 @@ EOF
     fi
 
     echo $ac_n "checking assembler and linker support unaligned pc related relocs""... $ac_c" 1>&6
-echo "configure:8284: checking assembler and linker support unaligned pc related relocs" >&5
+echo "configure:8296: checking assembler and linker support unaligned pc related relocs" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_sparc_ua_pcrel'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8307,7 +8319,7 @@ EOF
     fi
 
     echo $ac_n "checking assembler and linker support unaligned pc related relocs against hidden symbols""... $ac_c" 1>&6
-echo "configure:8311: checking assembler and linker support unaligned pc related relocs against hidden symbols" >&5
+echo "configure:8323: checking assembler and linker support unaligned pc related relocs against hidden symbols" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_sparc_ua_pcrel_hidden'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8347,7 +8359,7 @@ EOF
     fi
 
     echo $ac_n "checking for assembler offsetable %lo() support""... $ac_c" 1>&6
-echo "configure:8351: checking for assembler offsetable %lo() support" >&5
+echo "configure:8363: checking for assembler offsetable %lo() support" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_offsetable_lo10'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8386,7 +8398,7 @@ EOF
 
   i[34567]86-*-* | x86_64-*-*)
     echo $ac_n "checking assembler instructions""... $ac_c" 1>&6
-echo "configure:8390: checking assembler instructions" >&5
+echo "configure:8402: checking assembler instructions" >&5
     gcc_cv_as_instructions=
     if test $in_tree_gas = yes ; then 
        if test $gcc_cv_gas_major_version -eq 2 \
@@ -8420,7 +8432,7 @@ EOF
     echo "$ac_t""$gcc_cv_as_instructions" 1>&6
 
     echo $ac_n "checking assembler GOTOFF in data directives""... $ac_c" 1>&6
-echo "configure:8424: checking assembler GOTOFF in data directives" >&5
+echo "configure:8436: checking assembler GOTOFF in data directives" >&5
     gcc_cv_as_gotoff_in_data=no
     if test $in_tree_gas = yes ; then
        if test $gcc_cv_gas_major_version -eq 2 \
@@ -8454,7 +8466,7 @@ EOF
 
   ia64*-*-*)
     echo $ac_n "checking assembler supports ltoffx and ldxmov""... $ac_c" 1>&6
-echo "configure:8458: checking assembler supports ltoffx and ldxmov" >&5
+echo "configure:8470: checking assembler supports ltoffx and ldxmov" >&5
 if eval "test \"`echo '$''{'gcc_cv_as_ltoffx_ldxmov_relocs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -8499,7 +8511,7 @@ EOF
 esac
 
 echo $ac_n "checking assembler dwarf2 debug_line support""... $ac_c" 1>&6
-echo "configure:8503: checking assembler dwarf2 debug_line support" >&5
+echo "configure:8515: checking assembler dwarf2 debug_line support" >&5
 gcc_cv_as_dwarf2_debug_line=no
 # ??? Not all targets support dwarf2 debug_line, even within a version
 # of gas.  Moreover, we need to emit a valid instruction to trigger any
@@ -8561,7 +8573,7 @@ fi
 echo "$ac_t""$gcc_cv_as_dwarf2_debug_line" 1>&6
 
 echo $ac_n "checking assembler --gdwarf2 support""... $ac_c" 1>&6
-echo "configure:8565: checking assembler --gdwarf2 support" >&5
+echo "configure:8577: checking assembler --gdwarf2 support" >&5
 gcc_cv_as_gdwarf2_flag=no
 if test $in_tree_gas = yes ; then
    if test $gcc_cv_gas_major_version -eq 2 \
@@ -8595,7 +8607,7 @@ fi
 echo "$ac_t""$gcc_cv_as_gdwarf2_flag" 1>&6
 
 echo $ac_n "checking assembler --gstabs support""... $ac_c" 1>&6
-echo "configure:8599: checking assembler --gstabs support" >&5
+echo "configure:8611: checking assembler --gstabs support" >&5
 gcc_cv_as_gstabs_flag=no
 if test $in_tree_gas = yes ; then
    if test $gcc_cv_gas_major_version -eq 2 \
@@ -8628,7 +8640,7 @@ fi
 echo "$ac_t""$gcc_cv_as_gstabs_flag" 1>&6
 
 echo $ac_n "checking linker read-only and read-write section mixing""... $ac_c" 1>&6
-echo "configure:8632: checking linker read-only and read-write section mixing" >&5
+echo "configure:8644: checking linker read-only and read-write section mixing" >&5
 gcc_cv_ld_ro_rw_mix=unknown
 if test $in_tree_ld = yes ; then
   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 10 -o "$gcc_cv_gld_major_version" -gt 2 && grep 'EMUL = elf' ../ld/Makefile > /dev/null; then
@@ -8666,7 +8678,7 @@ fi
 echo "$ac_t""$gcc_cv_ld_ro_rw_mix" 1>&6
 
 echo $ac_n "checking linker PT_GNU_EH_FRAME support""... $ac_c" 1>&6
-echo "configure:8670: checking linker PT_GNU_EH_FRAME support" >&5
+echo "configure:8682: checking linker PT_GNU_EH_FRAME support" >&5
 gcc_cv_ld_eh_frame_hdr=no
 if test $in_tree_ld = yes ; then
   if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge 12 -o "$gcc_cv_gld_major_version" -gt 2 && grep 'EMUL = elf' ../ld/Makefile > /dev/null; then
@@ -8690,7 +8702,7 @@ echo "$ac_t""$gcc_cv_ld_eh_frame_hdr" 1>&6
 case "$target" in
   mips*-*-*)
     echo $ac_n "checking whether libgloss uses STARTUP directives consistently""... $ac_c" 1>&6
-echo "configure:8694: checking whether libgloss uses STARTUP directives consistently" >&5
+echo "configure:8706: checking whether libgloss uses STARTUP directives consistently" >&5
     gcc_cv_mips_libgloss_startup=no
     gcc_cv_libgloss_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/libgloss
     if test "x$exec_prefix" = xNONE; then
@@ -8895,7 +8907,7 @@ fi
 
 
 echo $ac_n "checking whether to enable maintainer-specific portions of Makefiles""... $ac_c" 1>&6
-echo "configure:8899: checking whether to enable maintainer-specific portions of Makefiles" >&5
+echo "configure:8911: checking whether to enable maintainer-specific portions of Makefiles" >&5
     # Check whether --enable-maintainer-mode or --disable-maintainer-mode was given.
 if test "${enable_maintainer_mode+set}" = set; then
   enableval="$enable_maintainer_mode"