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-rw-r--r--configure.ac26
-rw-r--r--src/plist.c39
2 files changed, 45 insertions, 20 deletions
diff --git a/configure.ac b/configure.ac
index 9300f31..0d13e04 100644
--- a/configure.ac
+++ b/configure.ac
@@ -55,17 +55,17 @@ AC_C_BIGENDIAN([AC_DEFINE([__BIG_ENDIAN__], [1], [big endian])],
# Check for operating system
-AC_MSG_CHECKING([wether we need platform-specific build settings for ${host_os}])
+AC_MSG_CHECKING([for platform-specific build settings])
case ${host_os} in
*mingw32*|*cygwin*)
- AC_MSG_RESULT([yes])
+ AC_MSG_RESULT([${host_os}])
win32=true
;;
darwin*|*android*)
- AC_MSG_RESULT([no])
+ AC_MSG_RESULT([${host_os}])
;;
*)
- AC_MSG_RESULT([yes])
+ AC_MSG_RESULT([${host_os}])
AX_PTHREAD([], [AC_MSG_ERROR([pthread is required to build libplist])])
AC_CHECK_LIB(pthread, [pthread_once], [], [AC_MSG_ERROR([pthread with pthread_once required to build libplist])])
;;
@@ -74,6 +74,24 @@ AM_CONDITIONAL(WIN32, test x$win32 = xtrue)
AC_SEARCH_LIBS([fmin],[m])
+# Check if the C compiler supports __attribute__((constructor))
+AC_CACHE_CHECK([wether the C compiler supports constructor/destructor attributes],
+ ac_cv_attribute_constructor, [
+ ac_cv_attribute_constructor=no
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+ [[
+ static void __attribute__((constructor)) test_constructor(void) {
+ }
+ static void __attribute__((destructor)) test_destructor(void) {
+ }
+ ]], [])],
+ [ac_cv_attribute_constructor=yes]
+ )]
+)
+if test "$ac_cv_attribute_constructor" = "yes"; then
+ AC_DEFINE(HAVE_ATTRIBUTE_CONSTRUCTOR, 1, [Define if the C compiler supports constructor/destructor attributes])
+fi
+
# Check if struct tm has a tm_gmtoff member
AC_CACHE_CHECK(for tm_gmtoff in struct tm, ac_cv_struct_tm_gmtoff,
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
diff --git a/src/plist.c b/src/plist.c
index 454d08c..d0e6c77 100644
--- a/src/plist.c
+++ b/src/plist.c
@@ -63,7 +63,6 @@ static void internal_plist_deinit(void)
}
#ifdef WIN32
-
typedef volatile struct {
LONG lock;
int state;
@@ -83,7 +82,29 @@ static void thread_once(thread_once_t *once_control, void (*init_routine)(void))
}
InterlockedExchange(&(once_control->lock), 0);
}
+#else
+static pthread_once_t init_once = PTHREAD_ONCE_INIT;
+static pthread_once_t deinit_once = PTHREAD_ONCE_INIT;
+#define thread_once pthread_once
+#endif
+
+#ifndef HAVE_ATTRIBUTE_CONSTRUCTOR
+ #if defined(__llvm__) || defined(__GNUC__)
+ #define HAVE_ATTRIBUTE_CONSTRUCTOR
+ #endif
+#endif
+
+#ifdef HAVE_ATTRIBUTE_CONSTRUCTOR
+static void __attribute__((constructor)) libplist_initialize(void)
+{
+ thread_once(&init_once, internal_plist_init);
+}
+static void __attribute__((destructor)) libplist_deinitialize(void)
+{
+ thread_once(&deinit_once, internal_plist_deinit);
+}
+#elif defined(WIN32)
BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
{
switch (dwReason) {
@@ -98,22 +119,8 @@ BOOL WINAPI DllMain(HINSTANCE hModule, DWORD dwReason, LPVOID lpReserved)
}
return 1;
}
-
#else
-
-static pthread_once_t init_once = PTHREAD_ONCE_INIT;
-static pthread_once_t deinit_once = PTHREAD_ONCE_INIT;
-
-static void __attribute__((constructor)) libplist_initialize(void)
-{
- pthread_once(&init_once, internal_plist_init);
-}
-
-static void __attribute__((destructor)) libplist_deinitialize(void)
-{
- pthread_once(&deinit_once, internal_plist_deinit);
-}
-
+#warning No compiler support for constructor/destructor attributes, some features might not be available.
#endif
#ifndef HAVE_MEMMEM