diff --git a/lib/csu/amd64/Makefile b/lib/csu/amd64/Makefile
index b4a60a1ac11..80d14a7ae7a 100644
--- a/lib/csu/amd64/Makefile
+++ b/lib/csu/amd64/Makefile
@@ -22,21 +22,21 @@ crt1.s: crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 crt1.o: crt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} crt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} crt1.s
 
 gcrt1.s: crt1.c
 	${CC} ${CFLAGS} -DGCRT -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 gcrt1.o: gcrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} gcrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} gcrt1.s
 
 Scrt1.s: crt1.c
 	${CC} ${CFLAGS} -fPIC -DPIC -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 Scrt1.o: Scrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} Scrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} Scrt1.s
 
 realinstall:
 	${INSTALL} -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} \
diff --git a/lib/csu/arm/Makefile b/lib/csu/arm/Makefile
index 1e1d1fa2d55..bf4c7b15c42 100644
--- a/lib/csu/arm/Makefile
+++ b/lib/csu/arm/Makefile
@@ -21,21 +21,21 @@ crt1.s: crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 crt1.o: crt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} crt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} crt1.s
 
 gcrt1.s: crt1.c
 	${CC} ${CFLAGS} -DGCRT -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 gcrt1.o: gcrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} gcrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} gcrt1.s
 
 Scrt1.s: crt1.c
 	${CC} ${CFLAGS} -fPIC -DPIC -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 Scrt1.o: Scrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} Scrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} Scrt1.s
 
 realinstall:
 	${INSTALL} -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} \
diff --git a/lib/csu/i386-elf/Makefile b/lib/csu/i386-elf/Makefile
index aef9a5c1ef6..286c15cb905 100644
--- a/lib/csu/i386-elf/Makefile
+++ b/lib/csu/i386-elf/Makefile
@@ -21,7 +21,7 @@ gcrt1_c.s: crt1_c.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 gcrt1_c.o: gcrt1_c.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} gcrt1_c.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} gcrt1_c.s
 
 gcrt1.o: gcrt1_c.o crt1_s.o
 	${LD} ${LDFLAGS} -o gcrt1.o -r crt1_s.o gcrt1_c.o
@@ -31,7 +31,7 @@ crt1_c.s: crt1_c.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 crt1_c.o: crt1_c.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} crt1_c.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} crt1_c.s
 
 crt1.o:	crt1_c.o crt1_s.o
 	${LD} ${LDFLAGS} -o crt1.o -r crt1_s.o crt1_c.o
@@ -42,7 +42,7 @@ Scrt1_c.s: crt1_c.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 Scrt1_c.o: Scrt1_c.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} Scrt1_c.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} Scrt1_c.s
 
 Scrt1.o: Scrt1_c.o crt1_s.o
 	${LD} ${LDFLAGS} -o Scrt1.o -r crt1_s.o Scrt1_c.o
diff --git a/lib/csu/ia64/Makefile b/lib/csu/ia64/Makefile
index 41d2b9cf8f4..b12e88822d1 100644
--- a/lib/csu/ia64/Makefile
+++ b/lib/csu/ia64/Makefile
@@ -24,7 +24,7 @@ crtbrand.s: crtbrand.c
 	sed -i "" -e '/\.note\.ABI-tag/s/progbits/note/' ${.TARGET}
 
 crtbrand.o: crtbrand.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} crtbrand.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} crtbrand.s
 
 crt1.o: crt1_.o crtbrand.o
 	${LD} ${LDFLAGS} -r -o ${.TARGET} crt1_.o crtbrand.o
@@ -37,7 +37,7 @@ gcrtbrand.s: crtbrand.c
 	sed -i "" -e '/\.note\.ABI-tag/s/progbits/note/' ${.TARGET}
 
 gcrtbrand.o: gcrtbrand.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} gcrtbrand.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} gcrtbrand.s
 
 gcrt1.o: gcrt1_.o gcrtbrand.o
 	${LD} ${LDFLAGS} -r -o ${.TARGET} ${.ALLSRC}
@@ -50,7 +50,7 @@ Scrtbrand.s: crtbrand.c
 	sed -i "" -e '/\.note\.ABI-tag/s/progbits/note/' ${.TARGET}
 
 Scrtbrand.o: Scrtbrand.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} Scrtbrand.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} Scrtbrand.s
 
 Scrt1.o: Scrt1_.o Scrtbrand.o
 	${LD} ${LDFLAGS} -r -o ${.TARGET} ${.ALLSRC}
diff --git a/lib/csu/mips/Makefile b/lib/csu/mips/Makefile
index 1e1d1fa2d55..bf4c7b15c42 100644
--- a/lib/csu/mips/Makefile
+++ b/lib/csu/mips/Makefile
@@ -21,21 +21,21 @@ crt1.s: crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 crt1.o: crt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} crt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} crt1.s
 
 gcrt1.s: crt1.c
 	${CC} ${CFLAGS} -DGCRT -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 gcrt1.o: gcrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} gcrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} gcrt1.s
 
 Scrt1.s: crt1.c
 	${CC} ${CFLAGS} -fPIC -DPIC -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 Scrt1.o: Scrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} Scrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} Scrt1.s
 
 realinstall:
 	${INSTALL} -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} \
diff --git a/lib/csu/powerpc/Makefile b/lib/csu/powerpc/Makefile
index a3e0cabbe32..123391e12a5 100644
--- a/lib/csu/powerpc/Makefile
+++ b/lib/csu/powerpc/Makefile
@@ -22,21 +22,21 @@ crt1.s: crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 crt1.o: crt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} crt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} crt1.s
 
 gcrt1.s: crt1.c
 	${CC} ${CFLAGS} -DGCRT -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 gcrt1.o: gcrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} gcrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} gcrt1.s
 
 Scrt1.s: crt1.c
 	${CC} ${CFLAGS} -fPIC -DPIC -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 Scrt1.o: Scrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} Scrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} Scrt1.s
 
 realinstall:
 	${INSTALL} -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} \
diff --git a/lib/csu/powerpc64/Makefile b/lib/csu/powerpc64/Makefile
index a3e0cabbe32..123391e12a5 100644
--- a/lib/csu/powerpc64/Makefile
+++ b/lib/csu/powerpc64/Makefile
@@ -22,21 +22,21 @@ crt1.s: crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 crt1.o: crt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} crt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} crt1.s
 
 gcrt1.s: crt1.c
 	${CC} ${CFLAGS} -DGCRT -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 gcrt1.o: gcrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} gcrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} gcrt1.s
 
 Scrt1.s: crt1.c
 	${CC} ${CFLAGS} -fPIC -DPIC -S -o ${.TARGET} ${.CURDIR}/crt1.c
 	sed ${SED_FIX_NOTE} ${.TARGET}
 
 Scrt1.o: Scrt1.s
-	${CC} ${CFLAGS} -c -o ${.TARGET} Scrt1.s
+	${CC} ${ACFLAGS} -c -o ${.TARGET} Scrt1.s
 
 realinstall:
 	${INSTALL} -o ${LIBOWN} -g ${LIBGRP} -m ${LIBMODE} \