diff options
Diffstat (limited to 'lib/ccan/libccan.m4')
| -rw-r--r-- | lib/ccan/libccan.m4 | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/lib/ccan/libccan.m4 b/lib/ccan/libccan.m4 new file mode 100644 index 00000000000..92676c31842 --- /dev/null +++ b/lib/ccan/libccan.m4 @@ -0,0 +1,315 @@ +dnl find the ccan sources. +ccandir="../lib/ccan" +for d in $ccanpaths; do + if test -f "$srcdir/$d/str/str.c"; then + ccandir="$d" + AC_SUBST(ccandir) + break + fi +done +if test -f "$ccandir/str/str.c"; then :; else + AC_MSG_ERROR([cannot find ccan source in $ccandir]) +fi +CCAN_OBJ="$ccandir/hash/hash.o $ccandir/htable/htable.o $ccandir/ilog/ilog.o $ccandir/likely/likely.o $ccandir/str/debug.o $ccandir/str/str.o $ccandir/tally/tally.o" + +AC_SUBST(CCAN_OBJ) + +# Preferred method for including ccan modules is #include <ccan/module/...>. +CCAN_CFLAGS="-I$ccandir/.." +AC_SUBST(CCAN_CFLAGS) + +# All the configuration checks. Regrettably, the __attribute__ checks will +# give false positives on old GCCs, since they just cause warnings. But that's +# fairly harmless. +AC_CACHE_CHECK([whether we can compile with __attribute__((cold))], + samba_cv_attribute_cold, + [ + AC_COMPILE_IFELSE( + [ + static void __attribute__((cold)) + cleanup(void) { } + ], + samba_cv_attribute_cold=yes) + ]) + +if test x"$samba_cv_attribute_cold" = xyes ; then + AC_DEFINE(HAVE_ATTRIBUTE_COLD, 1, + [whether we can compile with __attribute__((cold))]) +fi + +AC_CACHE_CHECK([whether we can compile with __attribute__((const))], + samba_cv_attribute_const, + [ + AC_COMPILE_IFELSE( + [ + static void __attribute__((const)) + cleanup(void) { } + ], + samba_cv_attribute_const=yes) + ]) + +if test x"$samba_cv_attribute_const" = xyes ; then + AC_DEFINE(HAVE_ATTRIBUTE_CONST, 1, + [whether we can compile with __attribute__((const))]) +fi + +AC_CACHE_CHECK([whether we can compile with __attribute__((noreturn))], + samba_cv_attribute_noreturn, + [ + AC_COMPILE_IFELSE( + [ + static void __attribute__((noreturn)) + cleanup(void) { exit(1); } + ], + samba_cv_attribute_noreturn=yes) + ]) + +if test x"$samba_cv_attribute_noreturn" = xyes ; then + AC_DEFINE(HAVE_ATTRIBUTE_NORETURN, 1, + [whether we can compile with __attribute__((noreturn))]) +fi + +AC_CACHE_CHECK([whether we can compile with __attribute__((printf))], + samba_cv_attribute_printf, + [ + AC_COMPILE_IFELSE( + [ + static void __attribute__((format(__printf__, 1, 2))) + cleanup(const char *fmt, ...) { } + ], + samba_cv_attribute_printf=yes) + ]) + +if test x"$samba_cv_attribute_printf" = xyes ; then + AC_DEFINE(HAVE_ATTRIBUTE_PRINTF, 1, + [whether we can compile with __attribute__((format(printf)))]) +fi + +AC_CACHE_CHECK([whether we can compile with __attribute__((unused))], + samba_cv_attribute_unused, + [ + AC_COMPILE_IFELSE( + [ + static void __attribute__((unused)) + cleanup(void) { } + ], + samba_cv_attribute_unused=yes) + ]) + +if test x"$samba_cv_attribute_unused" = xyes ; then + AC_DEFINE(HAVE_ATTRIBUTE_UNUSED, 1, + [whether we can compile with __attribute__((unused))]) +fi + +AC_CACHE_CHECK([whether we can compile with __attribute__((used))], + samba_cv_attribute_used, + [ + AC_COMPILE_IFELSE( + [ + static void __attribute__((used)) + cleanup(void) { } + ], + samba_cv_attribute_used=yes) + ]) + +if test x"$samba_cv_attribute_used" = xyes ; then + AC_DEFINE(HAVE_ATTRIBUTE_USED, 1, + [whether we can compile with __attribute__((used))]) +fi + +# FIXME: We could use endian.h or sys/endian.h here, and __BYTE_ORDER for +# cross-compiling. +AC_CACHE_CHECK([whether we are big endian],samba_cv_big_endian,[ +AC_TRY_RUN([int main(void) { +union { int i; char c[sizeof(int)]; } u; + u.i = 0x01020304; + return u.c[0] == 0x01 && u.c[1] == 0x02 && u.c[2] == 0x03 && u.c[3] == 0x04 ? 0 : 1; +}], +samba_cv_big_endian=yes, +samba_cv_big_endian=no)]) +if test x"$samba_cv_big_endian" = xyes ; then + AC_DEFINE(HAVE_BIG_ENDIAN, 1, + [whether we are big endian]) +fi + +AC_CACHE_CHECK([whether we have __builtin_clz], + samba_cv_builtin_clz, + [ + AC_COMPILE_IFELSE( + [int main(void) { + return __builtin_clz(1) == (sizeof(int)*8 - 1) ? 0 : 1; + }], + samba_cv_builtin_clz=yes) + ]) + +if test x"$samba_cv_builtin_clz" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_CLZ, 1, + [whether we have __builtin_clz]) +fi + +AC_CACHE_CHECK([whether we have __builtin_clzl], + samba_cv_builtin_clzl, + [ + AC_COMPILE_IFELSE( + [int main(void) { + return __builtin_clzl(1) == (sizeof(int)*8 - 1) ? 0 : 1; + }], + samba_cv_builtin_clzl=yes) + ]) + +if test x"$samba_cv_builtin_clzl" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_CLZL, 1, + [whether we have __builtin_clzl]) +fi +AC_CACHE_CHECK([whether we have __builtin_clzll], + samba_cv_builtin_clzll, + [ + AC_COMPILE_IFELSE( + [int main(void) { + return __builtin_clzll(1) == (sizeof(int)*8 - 1) ? 0 : 1; + }], + samba_cv_builtin_clzll=yes) + ]) + +if test x"$samba_cv_builtin_clzll" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_CLZLL, 1, + [whether we have __builtin_clzll]) +fi + +AC_CACHE_CHECK([whether we have __builtin_constant_p], + samba_cv_builtin_constant_p, + [ + AC_COMPILE_IFELSE( + [int main(void) { + return __builtin_constant_p(1) ? 0 : 1; + }], + samba_cv_builtin_constant_p=yes) + ]) + +if test x"$samba_cv_builtin_constant_p" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_CONSTANT_P, 1, + [whether we have __builtin_constant_p]) +fi + +AC_CACHE_CHECK([whether we have __builtin_expect], + samba_cv_builtin_expect, + [ + AC_COMPILE_IFELSE( + [int main(void) { + return __builtin_expect(main != 0) ? 0 : 1; + }], + samba_cv_builtin_expect=yes) + ]) + +if test x"$samba_cv_builtin_expect" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_EXPECT, 1, + [whether we have __builtin_expect]) +fi + +AC_CACHE_CHECK([whether we have __builtin_popcountl], + samba_cv_builtin_popcountl, + [ + AC_COMPILE_IFELSE( + [int main(void) { + return __builtin_popcountl(255L) == 8 ? 0 : 1; + }], + samba_cv_builtin_popcountl=yes) + ]) + +if test x"$samba_cv_builtin_popcountl" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_POPCOUNTL, 1, + [whether we have __builtin_popcountl]) +fi + +AC_CACHE_CHECK([whether we have __builtin_types_compatible_p], + samba_cv_builtin_types_compatible_p, + [ + AC_COMPILE_IFELSE( + [int main(void) { + return __builtin_types_compatible_p(char *, int) ? 1 : 0; + }], + samba_cv_builtin_types_compatible_p=yes) + ]) + +if test x"$samba_cv_builtin_types_compatible_p" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_TYPES_COMPATIBLE_P, 1, + [whether we have __builtin_types_compatible_p]) +fi + +AC_CACHE_CHECK([whether we have __builtin_compound_literals], + samba_cv_builtin_compound_literals, + [ + AC_COMPILE_IFELSE( + [int main(void) { + int *foo = (int[]) { 1, 2, 3, 4 }; + return foo[0] == 1 ? 0 : 1; + }], + samba_cv_builtin_compound_literals=yes) + ]) + +if test x"$samba_cv_builtin_compound_literals" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_COMPOUND_LITERALS, 1, + [whether we have __builtin_compound_literals]) +fi + +AC_CACHE_CHECK([whether we have __builtin_have_isblank], + samba_cv_builtin_have_isblank, + [ + AC_COMPILE_IFELSE( + [#include <ctype.h> + int main(void) { return isblank(' ') ? 0 : 1; } + ], + samba_cv_builtin_have_isblank=yes) + ]) + +if test x"$samba_cv_builtin_have_isblank" = xyes ; then + AC_DEFINE(HAVE_BUILTIN_HAVE_ISBLANK, 1, + [whether we have __builtin_have_isblank]) +fi + +# FIXME: We could use endian.h or sys/endian.h here, and __BYTE_ORDER for +# cross-compiling. +AC_CACHE_CHECK([whether we are little endian],samba_cv_little_endian,[ +AC_TRY_RUN([int main(void) { +union { int i; char c[sizeof(int)]; } u; + u.i = 0x01020304; + return u.c[0] == 0x04 && u.c[1] == 0x03 && u.c[2] == 0x02 && u.c[3] == 0x01 ? 0 : 1; +}], +samba_cv_little_endian=yes, +samba_cv_little_endian=no)]) +if test x"$samba_cv_little_endian" = xyes ; then + AC_DEFINE(HAVE_LITTLE_ENDIAN, 1, + [whether we are little endian]) +fi + +AC_CACHE_CHECK([whether we have __typeof__], + samba_cv_typeof, + [ + AC_COMPILE_IFELSE( + [int main(void) { + int x = 1; + __typeof__(x) i; + i = x; + return i == x ? 0 : 1; + }], + samba_cv_typeof=yes) + ]) + +if test x"$samba_cv_typeof" = xyes ; then + AC_DEFINE(HAVE_TYPEOF, 1, + [whether we have __typeof__]) +fi + +AC_CACHE_CHECK([whether we have __attribute__((warn_unused_result))], + samba_cv_warn_unused_result, + [ + AC_COMPILE_IFELSE( + [int __attribute__((warn_unused_result)) func(int x) + { return x; }], + samba_cv_warn_unused_result=yes) + ]) + +if test x"$samba_cv_warn_unused_result" = xyes ; then + AC_DEFINE(HAVE_WARN_UNUSED_RESULT, 1, + [whether we have __attribute__((warn_unused_result))]) +fi |