You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
3.5 KiB
118 lines
3.5 KiB
dnl Check for the __declspec(dllexport) construct support.
|
|
|
|
AC_DEFUN([AX_DECLSPEC],
|
|
[
|
|
AH_TEMPLATE($1[]_IMPORT,
|
|
[Defined if the compiler understands __declspec(dllimport)
|
|
or __attribute__((visibility("default"))) or __global construct.])
|
|
AH_TEMPLATE($1[]_EXPORT,
|
|
[Defined if the compiler understands __declspec(dllimport)
|
|
or __attribute__((visibility("default"))) or __global construct.])
|
|
AH_TEMPLATE($1[]_PRIVATE,
|
|
[Defined if the compiler understands __attribute__((visibility("hidden")))
|
|
or __hidden construct.])
|
|
|
|
AS_VAR_SET([continue_checks], [1])
|
|
|
|
dnl This is for Solaris platforms with Solaris Studio.
|
|
|
|
AC_CACHE_CHECK([for __global and __hidden], [ac_cv__global],
|
|
[
|
|
AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[
|
|
__global int x = 0;
|
|
__global int foo ();
|
|
int foo () { return 0; }
|
|
__global int bar () { return x; }
|
|
__hidden int baz () { return 1; }
|
|
]],
|
|
[[]])],
|
|
[ac_cv__global=yes],
|
|
[ac_cv__global=no])
|
|
])
|
|
|
|
AS_IF([test "x$ac_cv__global" = "xyes"],
|
|
[AC_DEFINE($1[]_IMPORT, [__global])
|
|
AC_DEFINE($1[]_EXPORT, [__global])
|
|
AC_DEFINE($1[]_PRIVATE, [__hidden])
|
|
AS_UNSET([continue_checks])])
|
|
|
|
dnl This typically succeeds on Windows/MinGW/Cygwin.
|
|
|
|
AS_VAR_SET_IF([continue_checks],
|
|
[
|
|
AC_CACHE_CHECK([for __declspec(dllexport) and __declspec(dllimport)],
|
|
[ac_cv_declspec],
|
|
[
|
|
AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[
|
|
#if defined (__clang__)
|
|
// Here the problem is that Clang only warns that it does not support
|
|
// __declspec(dllexport) but still compiles the executable.
|
|
# error Please fail.
|
|
And extra please fail.
|
|
#else
|
|
__declspec(dllexport) int x = 0;
|
|
__declspec(dllexport) int foo ();
|
|
int foo () { return 0; }
|
|
__declspec(dllexport) int bar () { return x; }
|
|
#endif
|
|
]],
|
|
[[]])],
|
|
[ac_cv_declspec=yes],
|
|
[ac_cv_declspec=no])
|
|
])
|
|
|
|
AS_IF([test "x$ac_cv_declspec" = "xyes"],
|
|
[AC_DEFINE($1[]_IMPORT, [__declspec(dllimport)])
|
|
AC_DEFINE($1[]_EXPORT, [__declspec(dllexport)])
|
|
AC_DEFINE($1[]_PRIVATE, [/* empty */])
|
|
AS_UNSET([continue_checks])])
|
|
])
|
|
|
|
dnl This typically succeeds on *NIX platforms with GCC or Clang.
|
|
|
|
AS_VAR_SET_IF([continue_checks],
|
|
[
|
|
AC_CACHE_CHECK([for __attribute__((visibility("default")))dnl
|
|
and __attribute__((visibility("hidden")))], [ac_cv__attribute__visibility],
|
|
[
|
|
AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[
|
|
#if defined (__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ <= 1))
|
|
# error Please fail.
|
|
And extra please fail.
|
|
#else
|
|
__attribute__((visibility("default"))) int x = 0;
|
|
__attribute__((visibility("default"))) int foo ();
|
|
int foo () { return 0; }
|
|
__attribute__((visibility("default"))) int bar () { return x; }
|
|
__attribute__((visibility("hidden"))) int baz () { return 1; }
|
|
#endif
|
|
]],
|
|
[[]])],
|
|
[ac_cv__attribute__visibility=yes],
|
|
[ac_cv__attribute__visibility=no])
|
|
])
|
|
|
|
AS_IF([test "x$ac_cv__attribute__visibility" = "xyes"],
|
|
[AC_DEFINE($1[]_IMPORT, [__attribute__ ((visibility("default")))])
|
|
AC_DEFINE($1[]_EXPORT, [__attribute__ ((visibility("default")))])
|
|
AC_DEFINE($1[]_PRIVATE, [__attribute__ ((visibility("hidden")))])
|
|
AS_UNSET([continue_checks])])
|
|
])
|
|
|
|
|
|
AS_IF([test "x$ac_cv__attribute__visibility" = "xno" dnl
|
|
&& test "x$ac_cv_declspec" = "xno" dnl
|
|
&& test "x$ax_cv__global" = "xno"],
|
|
[AC_DEFINE($1[]_IMPORT, [/* empty */])
|
|
AC_DEFINE($1[]_EXPORT, [/* empty */])
|
|
AC_DEFINE($1[]_PRIVATE, [/* empty */])])
|
|
|
|
AS_UNSET([continue_checks])
|
|
|
|
]) dnl AX_DECLSPEC
|