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Enable --enable-hidden-symbols for SunPro C

This commit is contained in:
Dan Fandrich 2006-07-11 21:35:35 +00:00
parent fe22872d14
commit 10489879f7
2 changed files with 22 additions and 8 deletions
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21
configure.ac
View File

@ -1962,29 +1962,42 @@ AC_HELP_STRING([--disable-cookies],[Disable cookies support]),
dnl ************************************************************
dnl Enable hiding of internal symbols in library to reduce its size and
dnl speed dynamic linking of applications. This currently is only supported
dnl on gcc >= 4.0
dnl on gcc >= 4.0 and SunPro C.
dnl
AC_MSG_CHECKING([whether to enable hidden symbols in the library])
AC_ARG_ENABLE(hidden-symbols,
AC_HELP_STRING([--enable-hidden-symbols],[Hide internal symbols in library (gcc>=4)])
AC_HELP_STRING([--enable-hidden-symbols],[Hide internal symbols in library])
AC_HELP_STRING([--disable-hidden-symbols],[Leave all symbols with default visibility in library]),
[ case "$enableval" in
no)
AC_MSG_RESULT(no)
;;
*)
AC_MSG_CHECKING([whether $CC supports it])
if test "$GCC" = yes ; then
AC_MSG_CHECKING([whether $CC supports it])
if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then
AC_MSG_RESULT(yes)
AC_DEFINE(CURL_HIDDEN_SYMBOLS, 1, [to enable hidden symbols])
AC_SUBST(CURL_HIDDEN_SYMBOLS)
AC_DEFINE(CURL_EXTERN_SYMBOL, [__attribute__ ((visibility ("default")))], [to make a symbol visible])
AC_SUBST(CURL_EXTERN_SYMBOL)
CFLAGS="$CFLAGS -fvisibility=hidden"
else
AC_MSG_RESULT(no)
fi
else
AC_MSG_RESULT([no (not gcc)])
dnl Test for SunPro cc
if $CC 2>&1 | grep flags >/dev/null && $CC -flags | grep xldscope= >/dev/null ; then
AC_MSG_RESULT(yes)
AC_DEFINE(CURL_HIDDEN_SYMBOLS, 1, [to enable hidden symbols])
AC_SUBST(CURL_HIDDEN_SYMBOLS)
AC_DEFINE(CURL_EXTERN_SYMBOL, [__global], [to make a symbol visible])
AC_SUBST(CURL_EXTERN_SYMBOL)
CFLAGS="$CFLAGS -xldscope=hidden"
else
AC_MSG_RESULT(no)
fi
fi
;;
esac ],

9
include/curl/curl.h
View File

@ -61,11 +61,12 @@ extern "C" {
#ifdef CURL_HIDDEN_SYMBOLS
/*
* On gcc >= 4 if -fvisibility=hidden is given then this is used to cause
* external definitions to be put into the shared library. It makes no
* difference to applications whether this is set or not, only the library.
* This definition is used to make external definitions visibile in the
* shared library when symbols are hidden by default. It makes no
* difference when compiling applications whether this is set or not,
* only when compiling the library.
*/
#define CURL_EXTERN __attribute__ ((visibility ("default")))
#define CURL_EXTERN CURL_EXTERN_SYMBOL
#else
#define CURL_EXTERN
#endif