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build: port to GCC 4.6.4 + glibc 2.5

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On platforms this old, building with _FORTIFY_SOURCE equal to 2
results in duplicate definitions of standard library functions.
Problem reported by Nelson H. F. Beebe.
* configure.ac (_FORTIFY_SOURCE): Sort after GNULIB_PORTCHECK.
By default, do not enable this unless GNULIB_PORTCHECK is defined.
This better matches the original intent, which as I recall was to
enable these extra checks only with --enable-gcc-warnings.
This commit is contained in:
Paul Eggert 2014-11-14 12:20:17 -08:00
parent 9bcde6cdca
commit 5caf6c9358
2 changed files with 15 additions and 3 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
2014-11-14 Paul Eggert <eggert@cs.ucla.edu>
build: port to GCC 4.6.4 + glibc 2.5
On platforms this old, building with _FORTIFY_SOURCE equal to 2
results in duplicate definitions of standard library functions.
Problem reported by Nelson H. F. Beebe.
* configure.ac (_FORTIFY_SOURCE): Sort after GNULIB_PORTCHECK.
By default, do not enable this unless GNULIB_PORTCHECK is defined.
This better matches the original intent, which as I recall was to
enable these extra checks only with --enable-gcc-warnings.
2014-11-14 David Reitter <david.reitter@gmail.com>
* Makefile.in (install-arch-indep): Compress publicsuffix.txt file.

7
configure.ac
View file

@ -899,14 +899,15 @@ else
fi
AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.])
AH_VERBATIM([FORTIFY_SOURCE],
AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
AH_VERBATIM([GNULIB_PORTCHECK_FORTIFY_SOURCE],
[/* Enable compile-time and run-time bounds-checking, and some warnings,
without upsetting glibc 2.15+. */
#if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__
#if (defined GNULIB_PORTCHECK && !defined _FORTIFY_SOURCE \
&& defined __OPTIMIZE__ && __OPTIMIZE__)
# define _FORTIFY_SOURCE 2
#endif
])
AC_DEFINE([GNULIB_PORTCHECK], [1], [enable some gnulib portability checks])
# We use a slightly smaller set of warning options for lib/.
# Remove the following and save the result in GNULIB_WARN_CFLAGS.