Add configure test for diagnostic _Pragma() use inside functions

jedbrown · May 29, 2011 · 02dd59a · 02dd59a
1 parent ac7820a
commit 02dd59a
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Showing 3 changed files with 19 additions and 1 deletion.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -90,3 +90,16 @@ add_subdirectory (src)
 if (Dohp_BUILD_SANDBOX)
   add_subdirectory (${Dohp_SOURCE_DIR}/sandbox)
 endif (Dohp_BUILD_SANDBOX)
+
+include (CheckCSourceCompiles) # The name is misleading, this also tries to link
+check_c_source_compiles ("
+#define PragmaQuote(a) _Pragma(#a)
+#define PragmaGCC(a) PragmaQuote(GCC a)
+int main(int argc,char *argv[]) {
+  PragmaGCC(diagnostic ignored \"-Wconversion\")
+  char c = (int)argv[0][0] + argv[argc-1][0];
+  return c;
+}" dHAVE_PRAGMA_GCC)
+if (dHAVE_PRAGMA_GCC)
+  set (dHAVE_PRAGMA_GCC TRUE)
+endif ()
diff --git a/dohpconfig.h.in b/dohpconfig.h.in
@@ -5,5 +5,6 @@
 #cmakedefine dUSE_PARALLEL_HDF5
 #cmakedefine dUSE_LOG_FINEGRAIN
 #cmakedefine dUSE_VALGRIND
+#cmakedefine dHAVE_PRAGMA_GCC
 
 #endif
diff --git a/include/dohp.h b/include/dohp.h
@@ -7,7 +7,11 @@
 #include <petscsys.h>
 
 #define dPragmaQuote(a) _Pragma(#a)
-#define dPragmaGCC(a) dPragmaQuote(GCC a)
+#if defined dHAVE_PRAGMA_GCC
+#  define dPragmaGCC(a) dPragmaQuote(GCC a)
+#else
+#  define dPragmaGCC(a)
+#endif
 
 #if defined dUSE_VALGRIND
 #  include <valgrind/memcheck.h>