diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 62 |
1 files changed, 60 insertions, 2 deletions
diff --git a/configure.ac b/configure.ac index bc9ff56c..fb073a01 100644 --- a/configure.ac +++ b/configure.ac @@ -73,6 +73,8 @@ m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) AC_CHECK_TOOL([READELF], [readelf]) AC_CHECK_TOOL([NM], [nm]) +AC_CHECK_FUNCS([futimens]) + # We use -std=gnu99 but have explicit checks for some language constructs # and GNU extensions since some compilers claim GNU99 support, but don't # really support all language extensions. In particular we need @@ -106,6 +108,54 @@ CFLAGS="$old_CFLAGS"]) AS_IF([test "x$ac_cv_c99" != xyes], AC_MSG_ERROR([gcc with GNU99 support required])) +AC_CACHE_CHECK([for -Wextra option to $CC], ac_cv_cc_wextra, [dnl +old_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -Wextra" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([void foo (void) { }])], + ac_cv_cc_wextra=yes, ac_cv_cc_wextra=no) +CFLAGS="$old_CFLAGS"]) +AC_SUBST(WEXTRA) +AS_IF([test "x$ac_cv_cc_wextra" = xyes], [WEXTRA=-Wextra], [WEXTRA=-W]) + +AC_CACHE_CHECK([for -fgnu89-inline option to $CC], ac_cv_cc_gnu89_inline, [dnl +old_CFLAGS="$CFLAGS" +CFLAGS="$CFLAGS -fgnu89-inline -Werror" +AC_COMPILE_IFELSE([AC_LANG_SOURCE([ +void foo (void) +{ + inline void bar (void) {} + bar (); +} +extern inline void baz (void) {} +])], ac_cv_cc_gnu89_inline=yes, ac_cv_cc_gnu89_inline=no) +CFLAGS="$old_CFLAGS"]) +AS_IF([test "x$ac_cv_cc_gnu89_inline" = xyes], + [WEXTRA="${WEXTRA:+$WEXTRA }-fgnu89-inline"]) + +AC_CACHE_CHECK([for --as-needed linker option], + ac_cv_as_needed, [dnl +cat > conftest.c <<EOF +int main (void) { return 0; } +EOF +if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS + -fPIC -shared -o conftest.so conftest.c + -Wl,--as-needed 1>&AS_MESSAGE_LOG_FD]) +then + ac_cv_as_needed=yes +else + ac_cv_as_needed=no +fi +rm -f conftest*]) +AS_IF([test "x$ac_cv_as_needed" = xyes], + [LD_AS_NEEDED=-Wl,--as-needed], [LD_AS_NEEDED=]) +AC_SUBST(LD_AS_NEEDED) + +AC_CACHE_CHECK([for __builtin_popcount], ac_cv_popcount, [dnl +AC_LINK_IFELSE([AC_LANG_PROGRAM([], [[exit (__builtin_popcount (127));]])], + ac_cv_popcount=yes, ac_cv_popcount=no)]) +AS_IF([test "x$ac_cv_popcount" = xyes], + [AC_DEFINE([HAVE_BUILTIN_POPCOUNT], [1], [Have __builtin_popcount.])]) + AC_CACHE_CHECK([for __thread support], ac_cv_tls, [dnl # Use the same flags that we use for our DSOs, so the test is representative. # Some old compiler/linker/libc combinations fail some ways and not others. @@ -122,7 +172,10 @@ static __thread int a; int foo (int b) { return a + b; }]], CFLAGS="$save_CFLAGS" LDFLAGS="$save_LDFLAGS"]) AS_IF([test "x$ac_cv_tls" != xyes], - AC_MSG_ERROR([__thread support required])) + [AS_IF([test "$use_locks" = yes], + [AC_MSG_ERROR([--enable-thread-safety requires __thread support])], + [AC_DEFINE([__thread], [/* empty: no multi-thread support */], + [Stubbed out if missing compiler support.])])]) dnl This test must come as early as possible after the compiler configuration dnl tests, because the choice of the file model can (in principle) affect @@ -224,6 +277,11 @@ AM_CONDITIONAL(USE_VALGRIND, test "$use_valgrind" = yes) AM_CONDITIONAL(BUILD_STATIC, [dnl test "$use_gprof" = yes -o "$use_gcov" = yes]) +AC_ARG_ENABLE([werror], +AS_HELP_STRING([--disable-werror],[do not build with -Werror]), + [enable_werror=$enableval], [enable_werror=yes]) +AM_CONDITIONAL(BUILD_WERROR, test "$enable_werror" = yes) + AC_ARG_ENABLE([tests-rpath], AS_HELP_STRING([--enable-tests-rpath],[build $ORIGIN-using rpath into tests]), [tests_use_rpath=$enableval], [tests_use_rpath=no]) @@ -388,7 +446,7 @@ case "$eu_version" in esac # Round up to the next release API (x.y) version. -eu_version=$(( (eu_version + 999) / 1000 )) +eu_version=`expr \( $eu_version + 999 \) / 1000` dnl Unique ID for this build. MODVERSION="Build for ${LIBEBL_SUBDIR} ${eu_version} ${ac_cv_build}" |