mpc.h, mpc-impl.h, logging.c: correctly determine that logging.c belongs

   to the library although it does not include mpc-impl.h
   see http://lists.gforge.inria.fr/pipermail/mpc-discuss/2011-December/001027.html


git-svn-id: svn://scm.gforge.inria.fr/svn/mpc/trunk@1117 211d60ee-9f03-0410-a15a-8952a2c7a4e4

3 files changed, 6 insertions, 1 deletions

diff --git a/src/logging.c b/src/logging.c
index 66ee2b8..79ed033 100644
--- a/src/logging.c
+++ b/src/logging.c
@@ -28,6 +28,9 @@ along with this program. If not, see http://www.gnu.org/licenses/ .
 #include <stdint.h>
 #endif
 
+#define __MPC_LIBRARY_BUILD
+   /* to indicate we are inside the library build; needed here since mpc-log.h
+      includes mpc.h and not mpc-impl.h */
 #include "mpc-log.h"
 
 #ifdef HAVE_DLFCN_H
diff --git a/src/mpc-impl.h b/src/mpc-impl.h
index 13582d1..8080479 100644
--- a/src/mpc-impl.h
+++ b/src/mpc-impl.h
@@ -20,6 +20,8 @@ along with this program. If not, see http://www.gnu.org/licenses/ .
 
 #ifndef __MPC_IMPL_H
 #define __MPC_IMPL_H
+#define __MPC_LIBRARY_BUILD
+   /* to indicate we are inside the library build */
 
 #include "config.h"
 #ifdef HAVE_STDLIB_H
diff --git a/src/mpc.h b/src/mpc.h
index 5b6ec46..3184a5a 100644
--- a/src/mpc.h
+++ b/src/mpc.h
@@ -123,7 +123,7 @@ typedef __gmp_const __mpc_struct *mpc_srcptr;
 /* Support for WINDOWS DLL, see
    http://lists.gforge.inria.fr/pipermail/mpc-discuss/2011-November/000990.html;
    when building the DLL, export symbols, otherwise behave as GMP           */
-#if defined (__MPC_IMPL_H) && __GMP_LIBGMP_DLL
+#if defined (__MPC_LIBRARY_BUILD) && __GMP_LIBGMP_DLL
 #define __MPC_DECLSPEC __GMP_DECLSPEC_EXPORT
 #else
 #define __MPC_DECLSPEC __GMP_DECLSPEC