From a9a3836861bd23387b5a51d6f6ac23377e98e26f Mon Sep 17 00:00:00 2001
From: Hiltjo Posthuma
Date: Mon, 7 Feb 2022 10:36:13 +0100
Subject: follow-up fix: add -D_GNU_SOURCE for strcasestr for some systems

---
 config.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config.mk b/config.mk
index 05d5a3e..bea4e4b 100644
--- a/config.mk
+++ b/config.mk
@@ -23,7 +23,7 @@ INCS = -I$(X11INC) -I$(FREETYPEINC)
 LIBS = -L$(X11LIB) -lX11 $(XINERAMALIBS) $(FREETYPELIBS)
 
 # flags
-CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" $(XINERAMAFLAGS)
+CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_GNU_SOURCE -D_XOPEN_SOURCE=700 -D_POSIX_C_SOURCE=200809L -DVERSION=\"$(VERSION)\" $(XINERAMAFLAGS)
 CFLAGS   = -std=c99 -pedantic -Wall -Os $(INCS) $(CPPFLAGS)
 LDFLAGS  = $(LIBS)
 
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