config.mk: fix POSIX_C_SOURCE macro for feature test for snprintf() - dwm - dynamic window manager
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       ---
 (DIR) commit c82db690cc0c4624dad4dc6ae899020799ec84db
 (DIR) parent cb3f58ad06993f7ef3a7d8f61468012e2b786cab
 (HTM) Author: Hiltjo Posthuma <hiltjo@codemadness.org>
       Date:   Fri,  3 Apr 2020 15:36:32 +0200
       
       config.mk: fix POSIX_C_SOURCE macro for feature test for snprintf()
       
       The feature test was incorrect:
       _POSIX_C_SOURCE=2
       
       "The value 2 or greater additionally exposes definitions for POSIX.2-1992."
       http://man7.org/linux/man-pages/man7/feature_test_macros.7.html
       
       A higher value is needed (atleast 1995):
       https://pubs.opengroup.org/onlinepubs/9699919799/functions/snprintf.html
       
       FreeBSD feature test macro:
       on
       https://github.com/freebsd/freebsd/blob/master/include/stdio.h line 297
       
       This was already fixed in dmenu.
       
       This fixes a warning on FreeBSD, reported by Plasmoduck on IRC, thanks.
       
       Diffstat:
         M config.mk                           |       2 +-
       
       1 file changed, 1 insertion(+), 1 deletion(-)
       ---
 (DIR) diff --git a/config.mk b/config.mk
       @@ -25,7 +25,7 @@ INCS = -I${X11INC} -I${FREETYPEINC}
        LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS}
        
        # flags
       -CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_C_SOURCE=2 -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
       +CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_C_SOURCE=200809L -DVERSION=\"${VERSION}\" ${XINERAMAFLAGS}
        #CFLAGS   = -g -std=c99 -pedantic -Wall -O0 ${INCS} ${CPPFLAGS}
        CFLAGS   = -std=c99 -pedantic -Wall -Wno-deprecated-declarations -Os ${INCS} ${CPPFLAGS}
        LDFLAGS  = ${LIBS}