Fix error on MinGW

2017-02-25 06:53:55 -08:00
parent 7258d1b8f3
commit 7175bd8ae6
2 changed files with 13 additions and 2 deletions
--- a/support/cmake/cxx11.cmake
+++ b/support/cmake/cxx11.cmake
@@ -20,7 +20,14 @@ if (FMT_USE_CPP11)
    check_cxx_source_compiles("
      #include <unistd.h>
      int main() {}" FMT_CPP11_UNISTD_H)
-    if (FMT_CPP11_CMATH AND FMT_CPP11_UNISTD_H)
+    # Check if snprintf works with -std=c++11. It may not in MinGW.
+    check_cxx_source_compiles("
+      #include <stdio.h>
+      int main() {
+        char buffer[10];
+        snprintf(buffer, 10, \"foo\");
+      }" FMT_CPP11_SNPRINTF)
+    if (FMT_CPP11_CMATH AND FMT_CPP11_UNISTD_H AND FMT_CPP11_SNPRINTF)
      set(CPP11_FLAG -std=c++11)
    else ()
      check_cxx_compiler_flag(-std=gnu++11 HAVE_STD_GNUPP11_FLAG)