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	Makefile: switch to use CPPFLAGS -D_DEFAULT_SOURCE - sfeed_curses - sfeed curse…
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	---
	commit b624558593a0d366e17c083a7a238203d5a52472
	parent c665475737051568791b0c1f9c198e69aa94c644
	Author: Hiltjo Posthuma <[email protected]>
	Date: Sat, 5 Jun 2021 15:41:17 +0200

	Makefile: switch to use CPPFLAGS -D_DEFAULT_SOURCE

	This fixes a warning on Linux glibc:

	/usr/include/features.h:187:3: warning: #warning "_BSD_SOURCE and _SVID_SOURCE …
	187 \| # warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SO…
	\| ^~~~~~~

	Tested on Gentoo, Void GNU/Linux glibc with gcc. Tested on various other
	platforms for regressions too namely: OpenBSD, NetBSD, FreeBSD, Void GNU/Linux
	musl.

	Diffstat:
	M Makefile \| 6 ++----

	1 file changed, 2 insertions(+), 4 deletions(-)
	---
	diff --git a/Makefile b/Makefile
	@@ -14,7 +14,7 @@ DOCPREFIX = ${PREFIX}/share/doc/${NAME}
	# use system flags.
	SFEED_CFLAGS = ${CFLAGS}
	SFEED_LDFLAGS = ${LDFLAGS} -lcurses
	-SFEED_CPPFLAGS = -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -D_BSD_SOURCE \
	+SFEED_CPPFLAGS = -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=700 -D_BSD_SOURCE \
	-DSFEED_THEME=\"themes/${SFEED_THEME}.h\"

	# Linux: some distros use ncurses and require -lncurses.
	@@ -23,11 +23,9 @@ SFEED_CPPFLAGS = -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=7…
	# Gentoo Linux: some distros might also require -ltinfo and -D_DEFAULT_SOURCE
	# to prevent warnings about feature macros.
	#SFEED_LDFLAGS = ${LDFLAGS} -lcurses -ltinfo
	-#SFEED_CPPFLAGS = -D_DEFAULT_SOURCE -D_POSIX_C_SOURCE=200809L \
	-# -D_XOPEN_SOURCE=700 -D_BSD_SOURCE -DSFEED_THEME=\"themes/${SFEED_THEM…

	# use minicurses with hardcoded escape sequences (not the system curses).
	-#SFEED_CPPFLAGS = -D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -D_BSD_SOURCE \
	+#SFEED_CPPFLAGS = -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=700 -D_BSD_SOURCE \
	# -DSFEED_THEME=\"themes/${SFEED_THEME}.h\" -DSFEED_MINICURSES
	#SFEED_LDFLAGS = ${LDFLAGS}