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Revise handling of version.h to avoid build problems. 

A patch to insert the version string from git broke compilation when
the source was not a git repository or when building in a read-only
source tree.  This patch avoids breaking compilation by using a
graceful failure mechanism for generating the version string and does
not write to the source tree.
This commit is contained in:
J Varshney 2008-04-10 21:44:50 -07:00 committed by Stephen Williams
parent 44767d8f70
commit bfb33230aa
1 changed files with 17 additions and 4 deletions
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21
Makefile.in
View File

@ -182,10 +182,23 @@ iverilog-vpi.ps: $(srcdir)/iverilog-vpi.man
iverilog-vpi.pdf: iverilog-vpi.ps
ps2pdf iverilog-vpi.ps iverilog-vpi.pdf
version.h: .git/index
git --git-dir $(srcdir)/.git describe \
| sed -e 's;\(.*\);#define VERSION_TAG "\1";' > $@tmp
diff $@tmp $(srcdir)/$@ > /dev/null 2>&1 || mv $@tmp $(srcdir)/$@
# For VERSION_TAG in driver/main.c, first try git-describe, then look for a
# version.h file in the source tree (included in snapshots and releases), and
# finally use nothing.
.PHONY: version.h
version.h:
@if test -d $(srcdir)/.git; then \
echo "Using git-describe for VERSION_TAG"; \
git --git-dir $(srcdir)/.git describe \
| sed -e 's;\(.*\);#define VERSION_TAG "\1";' > $@tmp; \
diff $@tmp $@ > /dev/null 2>&1 || mv $@tmp $@; \
elif test -r $(srcdir)/$@; then \
echo "Using $(srcdir)/$@ for VERSION_TAG"; \
diff $(srcdir)/$@ $@ > /dev/null 2>&1 || cp $(srcdir)/$@ $@; \
else \
echo "Using empty VERSION_TAG"; \
echo '#define VERSION_TAG ""' > $@; \
fi
ifeq (@MING32@,yes)
INSTALL_DOC = $(prefix)/iverilog-vpi.pdf $(mandir)/man1/iverilog-vpi.1