Syrone Wong a135d9c41e libsodium: Fix _FORTIFY_SOURCE redefined issue ...

If we already defined `CFLAGS=-D_FORTIFY_SOURCE=1`, it will still check `-D_FORTIFY_SOURCE=2` and
add it to CPPFLAGS. In this case, we redefine `_FORTIFY_SOURCE` to both 1 and 2 if compiler accepts `-D_FORTIFY_SOURCE=2`.

Fix this issue by checking whether `_FORTIFY_SOURCE` was defined or not.
If defined, do nothing. If not, then check `-D_FORTIFY_SOURCE=2`.

BTW, OpenWrt's buildroot uses `-D_FORTIFY_SOURCE=1` for most targets by default.

2015-08-02 10:21:42 +08:00

..

ax_check_compile_flag.m4

integrate libsodium as a subproject

2014-12-13 14:34:05 +08:00

ax_check_define.m4

libsodium: Fix _FORTIFY_SOURCE redefined issue

2015-08-02 10:21:42 +08:00

ax_check_gnu_make.m4

integrate libsodium as a subproject

2014-12-13 14:34:05 +08:00

ax_check_link_flag.m4

integrate libsodium as a subproject

2014-12-13 14:34:05 +08:00

ld-output-def.m4

integrate libsodium as a subproject

2014-12-13 14:34:05 +08:00

pkg.m4

integrate libsodium as a subproject

2014-12-13 14:34:05 +08:00