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| author | davi <davi@13f79535-47bb-0310-9956-ffa450edef68> | 2007-07-10 14:39:03 +0000 |
|---|---|---|
| committer | davi <davi@13f79535-47bb-0310-9956-ffa450edef68> | 2007-07-10 14:39:03 +0000 |
| commit | 068d5136d2ab18fca435f3e8ca25b61cd78e7bc5 (patch) | |
| tree | c8d60aee463cca5495c334fc48a5bfafca365437 /build/apr_common.m4 | |
| parent | 70738e7f53f36f5828e49143d48f8db221f7c83f (diff) | |
| download | libapr-068d5136d2ab18fca435f3e8ca25b61cd78e7bc5.tar.gz | |
Improve detection of the printf format identifiers for apr_ssize_t and apr_size_t
using the gcc (and icc) built-in __builtin_types_compatible_p (used to determine
if two types are the same). This could also be achieved with another gcc extension
(type redeclaration), but using the built-in seems more forward compatible.
git-svn-id: http://svn.apache.org/repos/asf/apr/apr/trunk@554963 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'build/apr_common.m4')
| -rw-r--r-- | build/apr_common.m4 | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/build/apr_common.m4 b/build/apr_common.m4 index 1c17591ec..1b2b15947 100644 --- a/build/apr_common.m4 +++ b/build/apr_common.m4 @@ -959,3 +959,17 @@ fi AC_SUBST(MKDEP) ]) + +dnl +dnl APR_CHECK_TYPES_COMPATIBLE(TYPE-1, TYPE-2, [ACTION-IF-TRUE]) +dnl +dnl Try to determine whether two types are the same. Only works +dnl for gcc and icc. +dnl +AC_DEFUN([APR_CHECK_TYPES_COMPATIBLE], [ +define([apr_cvname], apr_cv_typematch_[]translit([$1], [ ], [_])_[]translit([$2], [ ], [_])) +AC_CACHE_CHECK([whether $1 and $2 are the same], apr_cvname, [ +AC_TRY_COMPILE(AC_INCLUDES_DEFAULT, [ + int foo[0 - !__builtin_types_compatible_p($1, $2)]; +], [apr_cvname=yes $3], [apr_cvname=no])]) +]) |