69 lines
2.6 KiB
Diff
69 lines
2.6 KiB
Diff
Index: configure.ac
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===================================================================
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--- configure.ac.orig 2006-03-04 01:31:27.000000000 +0100
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+++ configure.ac 2009-10-07 01:53:26.000000000 +0200
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@@ -208,6 +208,44 @@ AC_SUBST(JAVA_INC)
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AC_SUBST(JAVA_INC_NATIVE)
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AM_CONDITIONAL(JAVAWRAPPER, test x$enable_java = xyes)
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+dnl ************************************************************
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+dnl Enable hiding of internal symbols in library to reduce its size and
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+dnl speed dynamic linking of applications. This currently is only supported
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+dnl on gcc >= 4.0 and SunPro C.
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+dnl
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+AC_MSG_CHECKING([whether to enable hidden symbols in the library])
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+AC_ARG_ENABLE(hidden-symbols,
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+AC_HELP_STRING([--enable-hidden-symbols],[Hide internal symbols in library])
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+AC_HELP_STRING([--disable-hidden-symbols],[Leave all symbols with default visibility in library]),
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+[ case "$enableval" in
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+ no)
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+ AC_MSG_RESULT(no)
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+ ;;
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+ *)
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+ AC_MSG_CHECKING([whether $CC supports it])
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+ if test "$GCC" = yes ; then
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+ if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then
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+ AC_MSG_RESULT(yes)
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+ AC_DEFINE(BRAILLE_API, [__attribute__ ((visibility ("default")))], [to make a symbol visible])
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+ CFLAGS="$CFLAGS -fvisibility=hidden"
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+ else
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+ AC_MSG_RESULT(no)
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+ fi
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+
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+ else
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+ dnl Test for SunPro cc
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+ if $CC 2>&1 | grep flags >/dev/null && $CC -flags | grep xldscope= >/dev/null ; then
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+ AC_MSG_RESULT(yes)
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+ AC_DEFINE(BRAILLE_API, [__global], [to make a symbol visible])
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+ CFLAGS="$CFLAGS -xldscope=hidden"
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+ else
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+ AC_MSG_RESULT(no)
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+ fi
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+ fi
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+ ;;
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+ esac ],
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+ AC_MSG_RESULT(no)
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+)
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# Finally create all the generated files
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# The configure script takes "file.in" and substitutes variables to produce
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# "file". In this case we are just generating the Makefiles, but this could
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Index: include/braille.h
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===================================================================
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--- include/braille.h.orig 2006-03-04 01:31:25.000000000 +0100
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+++ include/braille.h 2009-10-07 02:08:27.000000000 +0200
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@@ -25,13 +25,7 @@ extern "C" {
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// that uses this DLL. This way any other project whose source files include this file see
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// LIBBRAILLE_API functions as being imported from a DLL, wheras this DLL sees symbols
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// defined with this macro as being exported.
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-#ifdef WIN32
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-#ifdef LIBBRAILLE_EXPORTS
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-#define BRAILLE_API __declspec(dllexport)
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-#else
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-#define BRAILLE_API __declspec(dllimport)
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-#endif
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-#else
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+#ifndef BRAILLE_API
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#define BRAILLE_API
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#endif
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