-if test -n "$auto_cflags"; then
- dnl The user didn't specify CFLAGS, so customize them.
- if test "$GCC" = yes; then
- dnl Can't use -ansi with gcc 4.5.3 on Cygwin, at least through setup
- dnl version 2.763, because it disables some features in the system
- dnl header files and warns about them with -Wall. Try to test for
- dnl that generally, with gcc.
- AC_CACHE_CHECK([whether we can use -ansi with gcc], [nmh_cv_has_dash_ansi],
- [nmh_saved_cppflags="$CPPFLAGS"
- nmh_saved_cflags="$CFLAGS"
- CPPFLAGS="-D_GNU_SOURCE"
- CFLAGS="-ansi -Wall -Werror"
- AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <time.h>],[tzset();])],
- [nmh_cv_has_dash_ansi=yes],
- [nmh_cv_has_dash_ansi=no])
- CPPFLAGS="$nmh_saved_cppflags"
- CFLAGS="$nmh_saved_cflags"])
- test "$nmh_cv_has_dash_ansi" = "yes" && \
- CFLAGS="${CFLAGS:+$CFLAGS }-ansi -pedantic"
-
- dnl For Ubuntu gcc 4.8.1, with -O2. It would be better to fix all these,
- dnl but until then, suppress the warning.
- AC_CACHE_CHECK([whether compiler needs -Wno-unused-result],
- [nmh_cv_needs_wnur],
- [nmh_saved_cflags="$CFLAGS"
- CFLAGS="$CFLAGS -Werror -O2"
- AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>],
- [extern const char *path;
- chdir (path);
- return 0;])],
- [nmh_cv_needs_wnur=no],
- [nmh_cv_needs_wnur=yes])
- CFLAGS="$nmh_saved_cflags"])
- AS_IF([test "$nmh_cv_needs_wnur" = yes],
- [CFLAGS="${CFLAGS:+$CFLAGS }-Wno-unused-result"])
- else
- dnl Use -v and some other options with SunStudio cc. lex produces
- dnl code that causes unreachable-statement warnings. It might be
- dnl better to use an autoconf test, except -v will probably succeed
- dnl with many other compilers but have different meaning.
- AS_CASE([`${CC} -V 2>&1`],
- [cc:\ Sun\ C*], [CFLAGS=\
-"${CFLAGS:+$CFLAGS }-v -errtags=yes -erroff=E_STATEMENT_NOT_REACHED"])
- fi
+dnl The user didn't specify CFLAGS, so customize them.
+
+if test "$GCC" != yes; then
+ dnl Use -v and some other options with SunStudio cc. lex produces
+ dnl code that causes unreachable-statement warnings. It might be
+ dnl better to use an autoconf test, except -v will probably succeed
+ dnl with many other compilers but have different meaning.
+ AS_CASE([`${CC} -V 2>&1`],
+ [cc:\ Sun\ C*], [AM_CFLAGS=\
+"${AM_CFLAGS:+$AM_CFLAGS }-v -errtags=yes -erroff=E_STATEMENT_NOT_REACHED"])
+fi
projects / nmh / blobdiff