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| author | Stefan Metzmacher <metze@samba.org> | 2006-08-16 06:04:36 +0000 |
|---|---|---|
| committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 14:15:37 -0500 |
| commit | d6fed337112380695f8fabe8dc08b9b0dd05d7a6 (patch) | |
| tree | 4e4021ad67c8fe9430582ca418caa32ae4942d72 /source4/build/m4/check_cc.m4 | |
| parent | 4662f3a6d26f0509cbb36ea5f1658e61e961c31e (diff) | |
| download | samba-d6fed337112380695f8fabe8dc08b9b0dd05d7a6.tar.gz samba-d6fed337112380695f8fabe8dc08b9b0dd05d7a6.tar.bz2 samba-d6fed337112380695f8fabe8dc08b9b0dd05d7a6.zip | |
r17565: expand the test for negative enum values, systems like Tru64
truncate the value to INT_MAX...
So a AC_TRY_RUN test is needed here
metze
(This used to be commit dc0e22a52e3488a4cb9f17138389885183e90c34)
Diffstat (limited to 'source4/build/m4/check_cc.m4')
| -rw-r--r-- | source4/build/m4/check_cc.m4 | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/source4/build/m4/check_cc.m4 b/source4/build/m4/check_cc.m4 index 4850ec5504..c15da03637 100644 --- a/source4/build/m4/check_cc.m4 +++ b/source4/build/m4/check_cc.m4 @@ -86,11 +86,28 @@ fi ############################################ # check if the compiler can handle negative enum values +# and don't truncate the values to INT_MAX +# a runtime test is needed here AC_CACHE_CHECK([that the C compiler understands negative enum values],SMB_BUILD_CC_NEGATIVE_ENUM_VALUES, [ - AC_TRY_COMPILE([ -#include <stdio.h>], + AC_TRY_RUN( [ + #include <stdio.h> enum negative_values { NEGATIVE_VALUE = 0xFFFFFFFF }; + int main(void) { + enum negative_values v1 = NEGATIVE_VALUE; + unsigned v2 = NEGATIVE_VALUE; + + if (v1 != 0xFFFFFFFF) { + printf("%u != 0xFFFFFFFF\n", v1); + return 1; + } + if (v2 != 0xFFFFFFFF) { + printf("%u != 0xFFFFFFFF\n", v2); + return 1; + } + + return 0; + } ], SMB_BUILD_CC_NEGATIVE_ENUM_VALUES=yes,SMB_BUILD_CC_NEGATIVE_ENUM_VALUES=no)]) if test x"$SMB_BUILD_CC_NEGATIVE_ENUM_VALUES" != x"yes"; then |