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From: Sam James <sam@gentoo.org>
Date: Fri, 29 Oct 2021 22:50:40 +0100
Subject: [PATCH] Respect *FLAGS

--- a/Makefile
+++ b/Makefile
@@ -10,10 +10,11 @@ GIT_HASH ?= $(shell [ -d .git ] && git rev-parse HEAD)
 
 OS ?= $(shell uname -s)
 
-CPPFLAGS = -g -pthread -std=c++20 -fPIE \
-           -DMOLD_VERSION=\"0.9.6\" \
-           -DGIT_HASH=\"$(GIT_HASH)\" \
-	   $(EXTRA_CPPFLAGS)
+CFLAGS = -pthread -fPIE $(EXTRA_CFLAGS)
+CXXFLAGS = -pthread -std=c++20 -fPIE $(EXTRA_CXXFLAGS)
+CPPFLAGS = -DMOLD_VERSION=\"0.9.6\" \
+		-DGIT_HASH=\"$(GIT_HASH)\" \
+		$(EXTRA_CPPFLAGS)
 LDFLAGS += $(EXTRA_LDFLAGS)
 LIBS = -pthread -lz -lxxhash -ldl -lm
 
@@ -28,12 +29,6 @@ LTO ?= 0
 ASAN ?= 0
 TSAN ?= 0
 
-ifeq ($(DEBUG), 1)
-  CPPFLAGS += -O0
-else
-  CPPFLAGS += -O2
-endif
-
 ifeq ($(LTO), 1)
   CPPFLAGS += -flto -O3
   LDFLAGS  += -flto
@@ -73,11 +68,11 @@ endif
 all: mold mold-wrapper.so
 
 mold: $(OBJS) $(MIMALLOC_LIB) $(TBB_LIB)
-	$(CXX) $(CXXFLAGS) $(OBJS) -o $@ $(LDFLAGS) $(LIBS)
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) $(OBJS) -o $@ $(LIBS)
 	ln -sf mold ld
 
 mold-wrapper.so: elf/mold-wrapper.c Makefile
-	$(CC) -fPIC -shared -o $@ $< -ldl
+	$(CC) $(CPPFLAGS) $(CFLAGS) -fPIC -shared -o $@ $(LDFLAGS) $< -ldl
 
 $(OBJS): $(HEADERS) Makefile