-dnl check for vprintf/vsprintf() which are GNU extensions
-AC_FUNC_VPRINTF
-
-dnl check for vsscanf() and vsnprintf() - on some platforms (Linux, glibc
-dnl 2.1.1 for the first one, HP-UX for the second) it's available in the
-dnl library but the prototype is missing, so we can't use AC_CHECK_FUNCS() here,
-dnl do it manually. We can't use AC_TRY_COMPILE(), either, because it doesn't
-dnl check if the symbol is available at linking time
-
-dnl we use AC_TRY_LINK() here instead of AC_TRY_RUN() to make the checks
-dnl work for cross-compilation, but AC_TRY_LINK() normally only compiles
-dnl one function while we need at least 2 - hence the ugly hack below. To
-dnl understand why it works, remember that AC_TRY_LINK() just prepends
-dnl "int main() {" in the beginning of the code and "; return 0; }" at the
-dnl end...
-
-dnl if we fail to find vsnprintf, also try for _vsnprintf as that is what
-dnl we'll find under MSW if it exists.
-
-dnl final note: AC_TRY_LINK will only be executed if there is nothing in
-dnl the cache so we have to do AC_DEFINE(HAVE_VSNPRINTF) below and not inside
-dnl it or the symbol wouldn't be defined for the 2nd and subsequent configure
-dnl runs
-
-dnl check for vsnprintf() - a safe version of vsprintf()
-AC_CACHE_CHECK([for vsnprintf], wx_cv_func_vsnprintf,
-[
- AC_TRY_LINK([
- #include <stdio.h>
- #include <stdarg.h>
- ], [
- int wx_test_vsnprintf(const char *, ...);
-
- wx_test_vsnprintf("%s");
- return 0;
- }
-
- int wx_test_vsnprintf(const char *fmt, ...)
- {
- char *s;
-
- va_list argp;
- va_start(argp, fmt);
- vsnprintf(s, 42, fmt, argp);
- va_end(argp);
- ], [
- wx_cv_func_vsnprintf=yes
- ], [
- AC_TRY_LINK([
- #include <stdio.h>
- #include <stdarg.h>
- ], [
- int wx_test_vsnprintf(const char *, ...);
-
- wx_test_vsnprintf("%s");
- return 0;
- }
-
- int wx_test_vsnprintf(const char *fmt, ...)
- {
- char *s;
-
- va_list argp;
- va_start(argp, fmt);
- _vsnprintf(s, 42, fmt, argp);
- va_end(argp);
- ], [
- wx_cv_func_vsnprintf=yes
- ], [
- wx_cv_func_vsnprintf=no
- ])
- ])
-])
projects / wxWidgets.git / blobdiff