Author: cazfi
Date: Sat Nov 21 10:48:37 2015
New Revision: 30723
URL: http://svn.gna.org/viewcvs/freeciv?rev=30723&view=rev
Log:
Fixed configure check if compiler knows "-Wno-tautological-compare" commandline
option.
This makes sure it doesn't end up to compile command line, sometimes resulting
in
cc1: error: unrecognized command line option "-Wno-tautological-compare"
Reported anonymously
See bug #23448
Modified:
trunk/m4/compiler.m4
Modified: trunk/m4/compiler.m4
URL:
http://svn.gna.org/viewcvs/freeciv/trunk/m4/compiler.m4?rev=30723&r1=30722&r2=30723&view=diff
==============================================================================
--- trunk/m4/compiler.m4 (original)
+++ trunk/m4/compiler.m4 Sat Nov 21 10:48:37 2015
@@ -39,7 +39,9 @@
for flag in $3
do
- $2="$flags_save $existing_flags $accepted_flags $flag $4"
+ dnl We need -Werror to test any flags (it can't be tested itself)
+ dnl Without it, illegal flag will not give an error for us to detect
+ $2="-Werror $flags_save $existing_flags $accepted_flags $flag $4"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([int a;])],
[FC_ADD_WORDS_TO_VAR([accepted_flags], [$flag])])
done
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