maint: rename public .h files to .in.h

Generate .h files from .in.h files, so that we can continue
to use _GL_ATTRIBUTE_PURE and _GL_ATTRIBUTE_CONST in the primary
sources, without including them in publicly-installed files.
Each generated (and later installed) header file gets expansions
of those macros.
* include/parted/Makefile.am: New rules.
* .gitignore: Ignore the generated files.
* Makefile.am (SUBDIRS): Reorder so we build in include/ before
libparted, i.e., so that we generate the .h files we'll need.

16 files changed, 35 insertions, 2 deletions

diff --git a/include/parted/Makefile.am b/include/parted/Makefile.am
index 022373f..a5d2687 100644
--- a/include/parted/Makefile.am
+++ b/include/parted/Makefile.am
@@ -4,8 +4,7 @@ else
 S390_HDRS =
 endif
 
-partedincludedir      =	$(includedir)/parted
-
+partedincludedir = $(includedir)/parted
 partedinclude_HEADERS = constraint.h	\
 			debug.h		\
 			device.h	\
@@ -22,4 +21,38 @@ noinst_HEADERS	      = crc32.h		\
 			endian.h	\
 			$(S390_HDRS)
 
+BUILT_SOURCES = \
+  $(partedinclude_HEADERS)	\
+  $(noinst_HEADERS)		\
+  fdasd.h			\
+  vtoc.h
+
+EXTRA_DIST = $(BUILT_SOURCES:%.h=%.in.h)
+
+# We use _GL_ATTRIBUTE_CONST and _GL_ATTRIBUTE_PURE internally,
+# but cannot use those in a published header, so replace each of those
+# strings with its expansion.
+# Technically, attribute const was introduced in gcc-2.95 and
+# attribute pure in 2.96, but to keep it simple, we're testing
+# for 2.96 or newer for both.
+
+hash_if = \n\#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)\n
+subst_const_attr = \
+  s/ _GL_ATTRIBUTE_CONST\b/$(hash_if)  __attribute ((__const__))\n\#endif\n/
+subst_pure_attr = \
+  s/ _GL_ATTRIBUTE_PURE\b/$(hash_if)  __attribute ((__pure__))\n\#endif\n/
+
+$(BUILT_SOURCES): Makefile.am
+
+SUFFIXES = .in.h .h
+.in.h.h:
+	$(AM_V_GEN)rm -f $@ $@-t
+	$(AM_V_at)perl -p \
+	    -e '$(subst_const_attr);' \
+	    -e '$(subst_pure_attr);' \
+	  $< > $@-t
+	$(AM_V_at)chmod a=r $@-t
+	$(AM_V_at)mv $@-t $@
+
 MAINTAINERCLEANFILES = Makefile.in
+MAINTAINERCLEANFILES += $(BUILT_SOURCES)
diff --git a/include/parted/constraint.h b/include/parted/constraint.in.h
index 5f42fa0..5f42fa0 100644
--- a/include/parted/constraint.h
+++ b/include/parted/constraint.in.h
diff --git a/include/parted/crc32.h b/include/parted/crc32.in.h
index 74941f6..74941f6 100644
--- a/include/parted/crc32.h
+++ b/include/parted/crc32.in.h
diff --git a/include/parted/debug.h b/include/parted/debug.in.h
index 09b47ab..09b47ab 100644
--- a/include/parted/debug.h
+++ b/include/parted/debug.in.h
diff --git a/include/parted/device.h b/include/parted/device.in.h
index a3d1737..a3d1737 100644
--- a/include/parted/device.h
+++ b/include/parted/device.in.h
diff --git a/include/parted/disk.h b/include/parted/disk.in.h
index 46bde3f..46bde3f 100644
--- a/include/parted/disk.h
+++ b/include/parted/disk.in.h
diff --git a/include/parted/endian.h b/include/parted/endian.in.h
index 0e7c923..0e7c923 100644
--- a/include/parted/endian.h
+++ b/include/parted/endian.in.h
diff --git a/include/parted/exception.h b/include/parted/exception.in.h
index dd302b8..dd302b8 100644
--- a/include/parted/exception.h
+++ b/include/parted/exception.in.h
diff --git a/include/parted/fdasd.h b/include/parted/fdasd.in.h
index ac30134..ac30134 100644
--- a/include/parted/fdasd.h
+++ b/include/parted/fdasd.in.h
diff --git a/include/parted/filesys.h b/include/parted/filesys.in.h
index 2f74c91..2f74c91 100644
--- a/include/parted/filesys.h
+++ b/include/parted/filesys.in.h
diff --git a/include/parted/geom.h b/include/parted/geom.in.h
index 15ad017..15ad017 100644
--- a/include/parted/geom.h
+++ b/include/parted/geom.in.h
diff --git a/include/parted/natmath.h b/include/parted/natmath.in.h
index e1d09eb..e1d09eb 100644
--- a/include/parted/natmath.h
+++ b/include/parted/natmath.in.h
diff --git a/include/parted/parted.h b/include/parted/parted.in.h
index fbcb9aa..fbcb9aa 100644
--- a/include/parted/parted.h
+++ b/include/parted/parted.in.h
diff --git a/include/parted/timer.h b/include/parted/timer.in.h
index 7f25b2e..7f25b2e 100644
--- a/include/parted/timer.h
+++ b/include/parted/timer.in.h
diff --git a/include/parted/unit.h b/include/parted/unit.in.h
index 584a0c4..584a0c4 100644
--- a/include/parted/unit.h
+++ b/include/parted/unit.in.h
diff --git a/include/parted/vtoc.h b/include/parted/vtoc.in.h
index d79ce39..d79ce39 100644
--- a/include/parted/vtoc.h
+++ b/include/parted/vtoc.in.h