+ dnl On HP-UX aCC need this define to find mbstrtowcs() &c
+ dnl Can't be used for g++ since the mbstate_t in wchar.h can conflict
+ dnl with g++'s in <cwchar> (unless -D_INCLUDE__STDC_A1_SOURCE is in the
+ dnl flags when g++ is configured, it will declare it's own).
+ if test "$USE_HPUX" = 1 -a "$GCC" != "yes"; then
+ CPPFLAGS="$CPPFLAGS -D_INCLUDE__STDC_A1_SOURCE "
+ fi
+
+ dnl Try to use wcsrtombs instead of wcstombs which is buggy in old GNU
+ dnl libc versions if possible. AC_CHECK_FUNCS only checks it's in the
+ dnl library, not the header, so do a header check for mbstate_t first.
+ AC_CHECK_TYPES([mbstate_t],
+ [AC_CHECK_FUNCS(wcsrtombs)],
+ [],
+ [#include <wchar.h>])
+else
+ AC_MSG_WARN([Wide character support is unavailable])
+fi
+
+dnl *printf() functions sometimes are available in the library but not
+dnl prototyped -- if this is the case, we can't use them from C++ code, but to
+dnl detect this we have to use C++ compiler for testing
+AC_LANG_SAVE
+AC_LANG_CPLUSPLUS
+
+dnl check for vsnprintf() -- a safe version of vsprintf())
+dnl
+dnl the trouble here is that on some systems (e.g HP-UX 10) this function is
+dnl present in libc but not in the system headers and so AC_CHECK_FUNCS (which,
+dnl stupidly, provides a dummy function declaration inside its extension)
+dnl succeeds, even with C++ compiler, but the compilation of wxWidgets fails
+dnl
+dnl so we first check if the function is in the library
+AC_CHECK_FUNCS(snprintf vsnprintf)
+
+if test "$ac_cv_func_vsnprintf" = "yes"; then
+ dnl yes it is -- now check if it is in the headers
+ AC_CACHE_CHECK([for vsnprintf declaration], wx_cv_func_vsnprintf_decl,
+ [
+ dnl our troubles are not over: HP-UX 11 prototypes vsnprintf() as
+ dnl taking "char *" and not "const char *" while Metrowerks does
+ dnl provide a correct vsnprintf declaration but in C++ mode it's
+ dnl always in std namespace and so we have to bring it in scope
+ AC_TRY_COMPILE(
+ [
+ #include <stdio.h>
+ #include <stdarg.h>
+ #ifdef __MSL__
+ #if __MSL__ >= 0x6000
+ namespace std {}
+ using namespace std;
+ #endif
+ #endif
+ ],
+ [
+ char *buf;
+ va_list ap;
+ vsnprintf(buf, 10u, "%s", ap);
+ ],
+ wx_cv_func_vsnprintf_decl=yes,
+ wx_cv_func_vsnprintf_decl=no
+ )
+ ]
+ )
+
+ if test "$wx_cv_func_vsnprintf_decl" = "yes"; then
+ AC_DEFINE(HAVE_VSNPRINTF_DECL)
+
+ dnl we know there is a vsnprintf declaration, but some old headers
+ dnl may have one taking a "char *" format instead of "const char *"
+ AC_CACHE_CHECK([if vsnprintf declaration is broken], wx_cv_func_broken_vsnprintf_decl,
+ [
+ AC_TRY_COMPILE(
+ [
+ #include <stdio.h>
+ #include <stdarg.h>
+ #ifdef __MSL__
+ #if __MSL__ >= 0x6000
+ namespace std {}
+ using namespace std;
+ #endif
+ #endif
+ ],
+ [
+ char *buf;
+ va_list ap;
+ const char *fmt = "%s";
+ vsnprintf(buf, 10u, fmt, ap);
+ ],
+ wx_cv_func_broken_vsnprintf_decl=no,
+ wx_cv_func_broken_vsnprintf_decl=yes
+ )
+ ]
+ )
+
+ if test "$wx_cv_func_broken_vsnprintf_decl" = "yes"; then
+ AC_DEFINE(HAVE_BROKEN_VSNPRINTF_DECL)
+ fi
projects / wxWidgets.git / blobdiff