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-rw-r--r--m4/curl-compilers.m415
1 files changed, 12 insertions, 3 deletions
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index c64db4bc6..79460b6d2 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -5,7 +5,7 @@
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
-# Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
@@ -151,8 +151,17 @@ AC_DEFUN([CURL_CHECK_COMPILER_DEC_C], [
dnl CURL_CHECK_COMPILER_GNU_C
dnl -------------------------------------------------
-dnl Verify if compiler being used is GNU C.
-
+dnl Verify if compiler being used is GNU C
+dnl
+dnl $compiler_num will be set to MAJOR * 100 + MINOR for gcc less than version
+dnl 7 and just $MAJOR * 100 for gcc version 7 and later.
+dnl
+dnl Examples:
+dnl Version 1.2.3 => 102
+dnl Version 2.95 => 295
+dnl Version 4.7 => 407
+dnl Version 9.2.1 => 900
+dnl
AC_DEFUN([CURL_CHECK_COMPILER_GNU_C], [
AC_REQUIRE([CURL_CHECK_COMPILER_INTEL_C])dnl
AC_REQUIRE([CURL_CHECK_COMPILER_CLANG])dnl