Use -Wwrite-strings compiler flag if supported, add required macros

String literals are const in C++. Using this warnings moves us closer to the stated goal of C++ compatibility, makes the code cleaner and lets compilers optimize the code better. Add m4/ax_append_compile_flags.m4 from Autoconf Archives for the AX_APPEND_COMPILE_FLAGS macro and m4/ax_check_compile_flag.m4 as its dependency.
2016-06-21 16:30:17 -07:00
parent 951e632757
commit a680d46edf
3 changed files with 142 additions and 0 deletions
@@ -14,6 +14,7 @@ PKG_PROG_PKG_CONFIG
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

 AX_CFLAGS_WARN_ALL
+AX_APPEND_COMPILE_FLAGS([-Wwrite-strings])
 AX_GCC_FUNC_ATTRIBUTE([format])

 case $host_os in