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From: Corinna Vinschen <corinna@sourceware.org>
To: cygwin-cvs@sourceware.org
Subject: [newlib-cygwin] Cygwin: Makefile: only regenerate cygwin_version.c if it changes
Date: Tue, 13 Dec 2022 13:16:37 +0000 (GMT) [thread overview]
Message-ID: <20221213131637.914C838533F7@sourceware.org> (raw)
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=f34db341fc8d6dbec37946dc537331be50f90343
commit f34db341fc8d6dbec37946dc537331be50f90343
Author: Corinna Vinschen <corinna@vinschen.de>
AuthorDate: Tue Dec 13 13:25:06 2022 +0100
Commit: Corinna Vinschen <corinna@vinschen.de>
CommitDate: Tue Dec 13 14:16:13 2022 +0100
Cygwin: Makefile: only regenerate cygwin_version.c if it changes
Make sure to create a new cygwin_version.c if it either doesn't
exist yet, or if it would be different from the former file.
This avoids unnecessary DLL rebuilding.
Fixes: 97eb64b909bc ("Cygwin: uname: generate default release string from git as well")
Fixes: 4949a82cde98 ("Cygwin: uname: fix building in non-git source dir")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Diff:
---
winsup/cygwin/Makefile.am | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/winsup/cygwin/Makefile.am b/winsup/cygwin/Makefile.am
index e61f72716e10..cf12b97f838a 100644
--- a/winsup/cygwin/Makefile.am
+++ b/winsup/cygwin/Makefile.am
@@ -419,12 +419,20 @@ dirs = $(srcdir) $(srcdir)/fhandler $(srcdir)/lib $(srcdir)/libc $(srcdir)/math
find_src_files = $(wildcard $(dir)/*.[chS]) $(wildcard $(dir)/*.cc)
src_files := $(foreach dir,$(dirs),$(find_src_files))
+# Regenerate uname_version.c only if it doesn't exist or if it differs
+# from the former uname_version.c
uname_version.c: .FORCE
$(AM_V_GEN)cd $(srcdir) && \
echo "const char *uname_dev_version = \
\"$$(git rev-parse --git-dir >/dev/null 2>&1 && \
git describe --dirty | sed -e 's/cygwin-//')\";" \
- > $(abs_builddir)/uname_version.c
+ > $(abs_builddir)/uname_version-pre.c && \
+ if [ -f $(abs_builddir)/uname_version.c ] && \
+ cmp $(abs_builddir)/uname_version.c \
+ $(abs_builddir)/uname_version-pre.c >/dev/null 2>&1 ; \
+ then :; else \
+ mv $(abs_builddir)/uname_version-pre.c \
+ $(abs_builddir)/uname_version.c; fi
.FORCE:
# mkvers.sh creates version.cc in the first place, winver.o always
reply other threads:[~2022-12-13 13:16 UTC|newest]
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