add transition helper to format.h

the transition from v3 to v4 introduced an API change that format.h does not provide printf functionality. to easi the transition we introduce a define `FMT_FORMAT_PROVIDE_PRINTF` that will pull in printf.h from format.h
fmtlib · Dec 28, 2017 · 0f98773 · 0f98773
1 parent 3193460
commit 0f98773
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/fmt/format.h b/fmt/format.h
@@ -25,6 +25,11 @@
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+// transition helper
+#ifdef FMT_FORMAT_PROVIDE_PRINTF
+#include "printf.h"
+#endif
+
 #ifndef FMT_FORMAT_H_
 #define FMT_FORMAT_H_