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authorMarcel Raad <raad@teamviewer.com>2017-06-16 14:06:23 +0200
committerMarcel Raad <raad@teamviewer.com>2017-06-16 22:31:57 +0200
commitb5c5909f30ea68a1528b1fe24871b2e49a01f119 (patch)
treea7cd006c238cb4375e23a391d4a88183dcd0198c
parent783ce023a54cde30f9b3597554d65e0d24aa2655 (diff)
downloadcurl-b5c5909f30ea68a1528b1fe24871b2e49a01f119.tar.gz
curl-compilers.m4: enable double-promotion warning
Enable -Wdouble-promotion for both GCC and clang. It warns on implicit promotion from float to double. Closes https://github.com/curl/curl/pull/1578
-rw-r--r--m4/curl-compilers.m410
1 files changed, 10 insertions, 0 deletions
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index 5860f946e..7d53953c9 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -891,6 +891,11 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
if test "$compiler_num" -ge "209"; then
tmp_CFLAGS="$tmp_CFLAGS -Wshift-sign-overflow"
fi
+ #
+ dnl Only clang 3.6 or later
+ if test "$compiler_num" -ge "306"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wdouble-promotion"
+ fi
fi
;;
#
@@ -1002,6 +1007,11 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
fi
fi
#
+ dnl Only gcc 4.6 or later
+ if test "$compiler_num" -ge "406"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Wdouble-promotion"
+ fi
+ #
fi
#
dnl Do not issue warnings for code in system include paths.