diff options
Diffstat (limited to 'unix/configure.ac')
| -rw-r--r-- | unix/configure.ac | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/unix/configure.ac b/unix/configure.ac index 74dbe08..3a9bdd0 100644 --- a/unix/configure.ac +++ b/unix/configure.ac @@ -105,6 +105,22 @@ SC_MISSING_POSIX_HEADERS AC_EXEEXT #------------------------------------------------------------------------ +# If we're using GCC, see if the compiler understands -fshort-wchar. If so, use it. +# It makes sure you can use the wchar_t type interchangable with Tcl_UniChar +#------------------------------------------------------------------------ + +if test -z "$no_short_wchar" && test -n "$GCC"; then + AC_CACHE_CHECK([if the compiler understands -fshort-wchar], + tcl_cv_cc_short_wchar, [ + hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -fshort-wchar" + AC_TRY_COMPILE(,, tcl_cv_cc_short_wchar=yes, tcl_cv_cc_short_wchar=no) + CFLAGS=$hold_cflags]) + if test $tcl_cv_cc_short_wchar = yes; then + CFLAGS="$CFLAGS -fshort-wchar" + fi +fi + +#------------------------------------------------------------------------ # If we're using GCC, see if the compiler understands -pipe. If so, use it. # It makes compiling go faster. (This is only a performance feature.) #------------------------------------------------------------------------ |