cmake part of bug 3527, with macro USE_WCHAR_T

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@18899 a592a061-630c-0410-9148-cb99ea01b6c8

diff --git a/development/cmake/config.h.cmake b/development/cmake/config.h.cmake
index 37351890d24c0dd78d9d4383cb07c08dd4ed38b2..3bd17bc0197424d87b2a61a88b9b70297d252aa7 100644 (file)
--- a/development/cmake/config.h.cmake
+++ b/development/cmake/config.h.cmake
@@ -160,8 +160,19 @@
 #  define WANT_GETFILEATTRIBUTESEX_WRAPPER 1
 #endif
 
 #  define WANT_GETFILEATTRIBUTESEX_WRAPPER 1
 #endif
 

-#if defined(HAVE_WCHAR_T) && SIZEOF_WCHAR_T == 4
-#  define LIBC_WCTYPE_USES_UCS4
+
+/*
+ * the FreeBSD libc uses UCS4, but libstdc++ has no proper wchar_t
+ * support compiled in:
+ * http://gcc.gnu.org/onlinedocs/libstdc++/faq/index.html#3_9
+ * And we are not interested at all what libc
+ * does: What we need is a 32bit wide wchar_t, and a libstdc++ that
+ * has the needed wchar_t support and uses UCS4. Whether it
+ * implements this with the help of libc, or whether it has own code
+ * does not matter for us, because we don't use libc directly (Georg)
+*/
+#if defined(HAVE_WCHAR_T) && SIZEOF_WCHAR_T == 4 && ! defined(__FREEBSD__)
+#  define USE_WCHAR_T

 #endif
 
 #if defined(MAKE_INTL_LIB) && defined(_MSC_VER)
 #endif
 
 #if defined(MAKE_INTL_LIB) && defined(_MSC_VER)