scc

commit 5eedaa9f030481f63ab828c89c0623068fd2b7a7
parent 3ef4da68f555260111abb67615a28885bf57a7b5
Author: Roberto E. Vargas Caballero <k0ga@shike2.net>
Date:   Wed, 11 Feb 2026 14:38:41 +0100

make: Change default CFLAGS and FFLAGS

This is a very weird situation, because classical cc accepted -O to
enable optimizations, but POSIX 2004 specified -O level for c99, but it
specified -O for default value of CFLAGS in make. This conjuction made
that gcc accepts -O1 but not -O 1, because -O 1 is interpreted like
the -O option and the source file 1. That makes that the default CFLAGS
of POSIX make cannot work with gcc (and clang), but GNU make uses -O1
instead of the -O 1 specified in POSIX. Seems both values should be
accepted by compliant POSIX tools, in order to avoid problems the best
option is to follow GNU make here and use -O1 instead of -O 1, even
when it is not strictly POSIX compliant.

Diffstat:
M
src/cmd/scc-make/defaults.c
 | 
4
++--
M
tests/make/execute/0015-pflag.sh
 | 
4
++--
M
tests/make/execute/0093-inference.sh
 | 
2
+-
M
tests/make/execute/0106-inference.sh
 | 
2
+-
M
tests/make/execute/0107-inference.sh
 | 
2
+-

5 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/src/cmd/scc-make/defaults.c b/src/cmd/scc-make/defaults.c
@@ -4,9 +4,9 @@ char defaults[] =
 	"AR = ar\n"
 	"ARFLAGS = -rv\n"
 	"CC = c99\n"
-	"CFLAGS = -O\n"
+	"CFLAGS = -O1\n"
 	"FC = fort77\n"
-	"FFLAGS = -O 1\n"
+	"FFLAGS = -O1\n"
 	"LDFLAGS =\n"
 	"LEX = lex\n"
 	"LFLAGS =\n"
diff --git a/tests/make/execute/0015-pflag.sh b/tests/make/execute/0015-pflag.sh
@@ -18,13 +18,13 @@ YFLAGS =
 ARFLAGS = -rv
 LDFLAGS = 
 LEX = lex
-CFLAGS = -O
+CFLAGS = -O1
 YACC = yacc
 CC = c99
 LFLAGS = 
 AR = ar
 SHELL = /bin/sh
-FFLAGS = -O 1
+FFLAGS = -O1
 .f.a:
 	${FC} -c ${FFLAGS} $<
 	${AR} ${ARFLAGS} $@ $*.o
diff --git a/tests/make/execute/0093-inference.sh b/tests/make/execute/0093-inference.sh
@@ -18,5 +18,5 @@ touch f.c
 scc make -f $tmp1) > $tmp2
 
 diff $tmp2 - <<EOF
-c99 -O -c f.c
+c99 -O1 -c f.c
 EOF
diff --git a/tests/make/execute/0106-inference.sh b/tests/make/execute/0106-inference.sh
@@ -15,5 +15,5 @@ all: f.o
 EOF
 
 diff $tmp1 - <<EOF
-c99 -O -c f.c
+c99 -O1 -c f.c
 EOF
diff --git a/tests/make/execute/0107-inference.sh b/tests/make/execute/0107-inference.sh
@@ -25,5 +25,5 @@ f.h:
 EOF
 
 diff $tmp1 - <<EOF
-c99 -O  -o f f.c
+c99 -O1  -o f f.c
 EOF