Hi Junio,
Just a quick heads-up on a recent cygwin breakage.
I updated my (64-bit) cygwin installation yesterday and (along
with many other packages) I noticed a new version of gcc (and
presumably libc) was installed (gcc v4.8.3-5 x86-64).
Unfortunately, this caused new warning to be issued when compiling
git. In particular, warnings about the implicit declaration of the
memmem(), strlcpy() and strcasestr() functions. As an example:
CC archive.o
archive.c: In function ‘format_subst’:
archive.c:44:3: warning: implicit declaration of function ‘memmem’ [-Wimplicit-function-declaration]
b = memmem(src, len, "$Format:", 8);
^
archive.c:44:5: warning: assignment makes pointer from integer without a cast [enabled by default]
b = memmem(src, len, "$Format:", 8);
^
I haven't spent too long on this, but it appears that the _XOPEN_SOURCE
setting now trumps _GNU_SOURCE and _BSD_SOURCE settings. (I am guessing
that /usr/lib/gcc/x86_64-pc-cygwin/4.8.3/include-fixed/sys/cdefs.h was
changed recently to reflect the new priority).
Anyway, based on that quick squint, I changed git-compat-util.h, thus:
diff --git a/git-compat-util.h b/git-compat-util.h
index 400e921..cef2691 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -75,7 +75,8 @@
# endif
#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
!defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \
- !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__)
+ !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \
+ !defined(__CYGWIN__)
#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
#endif
... which fixed up the build for me.
However, I haven't run any tests yet. Also, I would need to check
this out on 32-bit cygwin (I haven't booted that laptop into Win XP
for quite some time!).
Hmm, I don't really know if this is an unintended side-effect of a
recent change to cygwin (or a bug), but I couldn't see any mention
of this on the cygwin mailing list. (I don't intend to report this
to that mailing list; I don't want to subscribe to (yet another)
busy list). :(
ATB,
Ramsay Jones
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