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Support symbol visibility features of Sun / Oracle C compilers.

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Reported by Kiyoshi Kanazawa:
https://lists.gnu.org/archive/html/freetype-devel/2018-05/msg00008.html
Thanks to the suggestions by Alexei and Alan Coopersmith.

* builds/unix/configure.raw: Check if "-xldscope=hidden" is
accepted, and if so, it is added to CFLAGS.  This is the option
making Sun / Oracle C compilers hide the symbols from global
scope.
* include/freetype/config/ftconfig.h: Use "__global" prefix
for FT_EXPORT() macro, if SunPro C is newer than Sun ONE
Studio 8 (2003).
* builds/unix/ftconfig.in: Ditto.
* builds/vms/ftconfig.h: Ditto.
This commit is contained in:
suzuki toshiya 2018-05-04 12:55:48 +09:00
parent 660afb5ce8
commit 2b3e0ef6c0
5 changed files with 31 additions and 0 deletions
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17
ChangeLog
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@ -1,3 +1,20 @@
2018-05-04 suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
Support symbol visibility features of Sun / Oracle C compilers.
Reported by Kiyoshi Kanazawa:
https://lists.gnu.org/archive/html/freetype-devel/2018-05/msg00008.html
Thanks to the suggestions by Alexei and Alan Coopersmith.
* builds/unix/configure.raw: Check if "-xldscope=hidden" is
accepted, and if so, it is added to CFLAGS. This is the option
making Sun / Oracle C compilers hide the symbols from global
scope.
* include/freetype/config/ftconfig.h: Use "__global" prefix
for FT_EXPORT() macro, if SunPro C is newer than Sun ONE
Studio 8 (2003).
* builds/unix/ftconfig.in: Ditto.
* builds/vms/ftconfig.h: Ditto.
2018-05-02 Nikolaus Waxweiler <madigens@gmail.com>
Unbreak CMake Windows installation

8
builds/unix/configure.raw
View File

@ -311,6 +311,14 @@ AC_SUBST([XX_ANSIFLAGS])
# It is recommended that shared libraries hide symbols except those with
# explicit __attribute__((visibility("default"))).
#
AC_MSG_CHECKING([for -xldscope=hidden compiler flag])
orig_CFLAGS="${CFLAGS}"
CFLAGS="${CFLAGS} -xldscope=hidden"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
AC_MSG_RESULT(yes),
CFLAGS="${orig_CFLAGS}"
AC_MSG_RESULT(no))
AC_MSG_CHECKING([for -fvisibility=hidden compiler flag])
orig_CFLAGS="${CFLAGS}"
CFLAGS="${CFLAGS} -fvisibility=hidden"

2
builds/unix/ftconfig.in
View File

@ -493,6 +493,8 @@ FT_BEGIN_HEADER
#define FT_EXPORT( x ) __declspec( dllexport ) x
#elif defined( __GNUC__ ) && __GNUC__ >= 4
#define FT_EXPORT( x ) __attribute__(( visibility( "default" ) )) x
#elif defined( __SUNPRO_C ) && __SUNPRO_C >= 0x550
#define FT_EXPORT( x ) __global x
#elif defined( __cplusplus )
#define FT_EXPORT( x ) extern "C" x
#else

2
builds/vms/ftconfig.h
View File

@ -445,6 +445,8 @@ FT_BEGIN_HEADER
#define FT_EXPORT( x ) __declspec( dllexport ) x
#elif defined( __GNUC__ ) && __GNUC__ >= 4
#define FT_EXPORT( x ) __attribute__(( visibility( "default" ) )) x
#elif defined( __SUNPRO_C ) && __SUNPRO_C >= 0x550
#define FT_EXPORT( x ) __global x
#elif defined( __cplusplus )
#define FT_EXPORT( x ) extern "C" x
#else

2
include/freetype/config/ftconfig.h
View File

@ -461,6 +461,8 @@ FT_BEGIN_HEADER
#define FT_EXPORT( x ) __declspec( dllexport ) x
#elif defined( __GNUC__ ) && __GNUC__ >= 4
#define FT_EXPORT( x ) __attribute__(( visibility( "default" ) )) x
#elif defined( __SUNPRO_C ) && __SUNPRO_C >= 0x550
#define FT_EXPORT( x ) __global x
#elif defined( __cplusplus )
#define FT_EXPORT( x ) extern "C" x
#else