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| author | Yang Tse <yangsita@gmail.com> | 2012-12-16 18:51:51 +0100 |
|---|---|---|
| committer | Yang Tse <yangsita@gmail.com> | 2012-12-16 18:51:51 +0100 |
| commit | 57fa576a35e45a729939d5ef6bced81f3facbf63 (patch) | |
| tree | 6070a6c323e40c039191f50de39f038e30a10c4d /m4/curl-compilers.m4 | |
| parent | f6af9d9886ae49963bec0fda7dc6ea8720bbc20c (diff) | |
| download | curl-57fa576a35e45a729939d5ef6bced81f3facbf63.tar.gz | |
configure: check if compiler halts on function prototype mismatch
Diffstat (limited to 'm4/curl-compilers.m4')
| -rw-r--r-- | m4/curl-compilers.m4 | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4 index 819bbd9c8..0879a48e0 100644 --- a/m4/curl-compilers.m4 +++ b/m4/curl-compilers.m4 @@ -21,7 +21,7 @@ #*************************************************************************** # File version for 'aclocal' use. Keep it a single number. -# serial 63 +# serial 64 dnl CURL_CHECK_COMPILER @@ -1495,6 +1495,42 @@ AC_DEFUN([CURL_CHECK_COMPILER_SYMBOL_HIDING], [ ]) +dnl CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH +dnl ------------------------------------------------- +dnl Verifies if the compiler actually halts after the +dnl compilation phase without generating any object +dnl code file, when the source code tries to redefine +dnl a prototype which does not match previous one. + +AC_DEFUN([CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH], [ + AC_REQUIRE([CURL_CHECK_COMPILER_HALT_ON_ERROR])dnl + AC_MSG_CHECKING([if compiler halts on function prototype mismatch]) + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([[ +# include <stdlib.h> + int rand(int n); + int rand(int n) + { + if(n) + return ++n; + else + return n; + } + ]],[[ + int i[2]; + int j = rand(i[0]); + if(j) + return j; + ]]) + ],[ + AC_MSG_RESULT([no]) + AC_MSG_ERROR([compiler does not halt on function prototype mismatch.]) + ],[ + AC_MSG_RESULT([yes]) + ]) +]) + + dnl CURL_VAR_MATCH (VARNAME, VALUE) dnl ------------------------------------------------- dnl Verifies if shell variable VARNAME contains VALUE. |