build: Listen to make -s

8 files changed, 112 insertions, 48 deletions

diff --git a/build/config.mk b/build/config.mk
index 153838d..24873ec 100644
--- a/build/config.mk
+++ b/build/config.mk
@@ -43,20 +43,20 @@ gen/vars.mk::
 # Sets the build flags.  This depends on vars.mk and uses a recursive make so
 # that the default flags can depend on variables like ${OS}.
 gen/flags.mk: gen/vars.mk
-	@+${MAKE} -sf build/flags.mk $@
+	@+XMAKEFLAGS="$$MAKEFLAGS" ${MAKE} -sf build/flags.mk $@
 .PHONY: gen/flags.mk
 
 # Check for dependency generation support
 gen/deps.mk: gen/flags.mk
-	@+${MAKE} -sf build/deps.mk $@
+	@+XMAKEFLAGS="$$MAKEFLAGS" ${MAKE} -sf build/deps.mk $@
 .PHONY: gen/deps.mk
 
 # Auto-detect dependencies and their build flags
 gen/pkgs.mk: gen/flags.mk
-	@+${MAKE} -sf build/pkgs.mk $@
+	@+XMAKEFLAGS="$$MAKEFLAGS" ${MAKE} -sf build/pkgs.mk $@
 .PHONY: gen/pkgs.mk
 
 # Compile-time feature detection
 gen/config.h: gen/config.mk
-	@+${MAKE} -sf build/header.mk $@
+	@+XMAKEFLAGS="$$MAKEFLAGS" ${MAKE} -sf build/header.mk $@
 .PHONY: gen/config.h
diff --git a/build/deps.mk b/build/deps.mk
index e8dd9fb..3db62b6 100644
--- a/build/deps.mk
+++ b/build/deps.mk
@@ -10,9 +10,9 @@ include build/exports.mk
 
 gen/deps.mk::
 	${MSG} "[ GEN] $@"
-	printf '# %s\n' "$@" >$@
-	if build/cc.sh -MD -MP -MF /dev/null build/empty.c; then \
-	    printf 'DEPFLAGS := -MD -MP\n'; \
+	@printf '# %s\n' "$@" >$@
+	@if build/cc.sh -MD -MP -MF /dev/null build/empty.c; then \
+	    printf 'CPPFLAGS += -MD -MP\n'; \
 	fi >>$@ 2>$@.log
 	${VCAT} $@
-	printf -- '-include %s\n' ${OBJS:.o=.d} >>$@
+	@printf -- '-include %s\n' ${OBJS:.o=.d} >>$@
diff --git a/build/flags.mk b/build/flags.mk
index 0a44e94..c911b22 100644
--- a/build/flags.mk
+++ b/build/flags.mk
@@ -101,14 +101,14 @@ export RELEASE_CPPFLAGS=${RELEASE_CPPFLAGS,${_RELEASE}}
 export RELEASE_CFLAGS=${RELEASE_CFLAGS,${_RELEASE}}
 
 # Set a variable
-SETVAR = printf '%s := %s\n' >>$@
+SETVAR = @printf '%s := %s\n' >>$@
 
 # Append to a variable, if non-empty
-APPEND = append() { test -z "$$2" || printf '%s += %s\n' "$$1" "$$2" >>$@; }; append
+APPEND = @append() { test -z "$$2" || printf '%s += %s\n' "$$1" "$$2" >>$@; }; append
 
 gen/flags.mk::
 	${MSG} "[ GEN] $@"
-	printf '# %s\n' "$@" >$@
+	@printf '# %s\n' "$@" >$@
 	${SETVAR} CPPFLAGS "$$BFS_CPPFLAGS"
 	${APPEND} CPPFLAGS "$$TSAN_CPPFLAGS"
 	${APPEND} CPPFLAGS "$$LINT_CPPFLAGS"
@@ -132,5 +132,5 @@ gen/flags.mk::
 	${APPEND} LDLIBS "$$EXTRA_LDLIBS"
 	${APPEND} LDLIBS "$$BFS_LDLIBS"
 	${SETVAR} NOLIBS "$$XNOLIBS"
-	test "${OS}-${SAN}" != FreeBSD-y || printf 'POSTLINK = elfctl -e +noaslr $$@\n' >>$@
+	@test "${OS}-${SAN}" != FreeBSD-y || printf 'POSTLINK = elfctl -e +noaslr $$@\n' >>$@
 	${VCAT} $@
diff --git a/build/header.mk b/build/header.mk
index 3f77ca5..951f09b 100644
--- a/build/header.mk
+++ b/build/header.mk
@@ -48,12 +48,12 @@ PKG_HEADERS := ${ALL_PKGS:%=gen/use/%.h}
 
 gen/config.h: ${PKG_HEADERS} ${HEADERS}
 	${MSG} "[ GEN] $@"
-	printf '// %s\n' "$@" >$@
-	printf '#ifndef BFS_CONFIG_H\n' >>$@
-	printf '#define BFS_CONFIG_H\n' >>$@
-	cat ${.ALLSRC} >>$@
-	printf '#endif // BFS_CONFIG_H\n' >>$@
-	cat ${.ALLSRC:%=%.log} >$@.log
+	@printf '// %s\n' "$@" >$@
+	@printf '#ifndef BFS_CONFIG_H\n' >>$@
+	@printf '#define BFS_CONFIG_H\n' >>$@
+	@cat ${.ALLSRC} >>$@
+	@printf '#endif // BFS_CONFIG_H\n' >>$@
+	@cat ${.ALLSRC:%=%.log} >$@.log
 	${VCAT} $@
 .PHONY: gen/config.h
 
@@ -61,9 +61,6 @@ gen/config.h: ${PKG_HEADERS} ${HEADERS}
 SLUG = ${@:gen/%.h=%}
 
 ${HEADERS}::
-	${MKDIR} ${@D}
-	if build/define-if.sh ${SLUG} build/cc.sh build/${SLUG}.c >$@ 2>$@.log; then \
-	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✔\n' ${SLUG}.c; \
-	else \
-	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✘\n' ${SLUG}.c; \
-	fi
+	@${MKDIR} ${@D}
+	@build/define-if.sh ${SLUG} build/cc.sh build/${SLUG}.c >$@ 2>$@.log; \
+	    build/msg-if.sh "[ CC ] ${SLUG}.c" test $$? -eq 0
diff --git a/build/msg-if.sh b/build/msg-if.sh
new file mode 100755
index 0000000..8112aea
--- /dev/null
+++ b/build/msg-if.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+
+# Copyright © Tavian Barnes <tavianator@tavianator.com>
+# SPDX-License-Identifier: 0BSD
+
+# Print a success/failure indicator from a makefile:
+#
+#     $ ./configure
+#     [ CC ] use/liburing.c                  ✘
+#     [ CC ] use/oniguruma.c                 ✔
+
+set -eu
+
+MSG="$1"
+shift
+
+if "$@"; then
+    build/msg.sh "$(printf '%-37s  ✔' "$MSG")"
+else
+    build/msg.sh "$(printf '%-37s  ✘' "$MSG")"
+fi
diff --git a/build/msg.sh b/build/msg.sh
new file mode 100755
index 0000000..8b4714e
--- /dev/null
+++ b/build/msg.sh
@@ -0,0 +1,60 @@
+#!/bin/sh
+
+# Copyright © Tavian Barnes <tavianator@tavianator.com>
+# SPDX-License-Identifier: 0BSD
+
+# Print a message from a makefile:
+#
+#     $ make -s
+#     $ make
+#     [ CC ] src/main.c
+#     $ make V=1
+#     cc -Isrc -Igen -D...
+
+set -eu
+
+# Get the $MAKEFLAGS from the top-level make invocation
+MFLAGS="${XMAKEFLAGS-${MAKEFLAGS-}}"
+
+# Check if make should be quiet (make -s)
+is_quiet() {
+    # GNU make puts single-letter flags in the first word of $MAKEFLAGS,
+    # without a leading dash
+    case "${MFLAGS%% *}" in
+        -*) : ;;
+        *s*) return 0 ;;
+    esac
+
+    # BSD make puts each flag separately like -r -s -j 48
+    for flag in $MFLAGS; do
+        case "$flag" in
+            # Ignore things like --jobserver-auth
+            --*) continue ;;
+            -*s*) return 0 ;;
+        esac
+    done
+
+    return 1
+}
+
+# Check if make should be loud (make V=1)
+is_loud() {
+    test "$XV"
+}
+
+MSG="$1"
+shift
+
+if ! is_quiet && ! is_loud; then
+    printf '%s\n' "$MSG"
+fi
+
+if [ $# -eq 0 ]; then
+    exit
+fi
+
+if is_loud; then
+    printf '%s\n' "$*"
+fi
+
+"$@"
diff --git a/build/pkgs.mk b/build/pkgs.mk
index 51ca664..39b550d 100644
--- a/build/pkgs.mk
+++ b/build/pkgs.mk
@@ -12,8 +12,8 @@ HEADERS := ${ALL_PKGS:%=gen/use/%.h}
 
 gen/pkgs.mk: ${HEADERS}
 	${MSG} "[ GEN] $@"
-	printf '# %s\n' "$@" >$@
-	gen() { \
+	@printf '# %s\n' "$@" >$@
+	@gen() { \
 	    printf 'PKGS := %s\n' "$$*"; \
 	    printf 'CFLAGS += %s\n' "$$(build/pkgconf.sh --cflags "$$@")"; \
 	    printf 'LDFLAGS += %s\n' "$$(build/pkgconf.sh --ldflags "$$@")"; \
@@ -28,9 +28,6 @@ gen/pkgs.mk: ${HEADERS}
 PKG = ${@:gen/use/%.h=%}
 
 ${HEADERS}::
-	${MKDIR} ${@D}
-	if build/define-if.sh use/${PKG} build/pkgconf.sh ${PKG} >$@ 2>$@.log; then \
-	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✔\n' use/${PKG}.c; \
-	else \
-	    test "${IS_V}" || printf '[ CC ] %-${MSG_WIDTH}s  ✘\n' use/${PKG}.c; \
-	fi
+	@${MKDIR} ${@D}
+	@build/define-if.sh use/${PKG} build/pkgconf.sh ${PKG} >$@ 2>$@.log; \
+	    build/msg-if.sh "[ CC ] use/${PKG}.c" test $$? -eq 0;
diff --git a/build/prelude.mk b/build/prelude.mk
index b235fa9..5be26cb 100644
--- a/build/prelude.mk
+++ b/build/prelude.mk
@@ -44,33 +44,22 @@ TRUTHY,y := y
 TRUTHY,1 := y
 
 # Boolean operators are also implemented with nested expansion
-NOT,  := y
+NOT, := y
 
 # Normalize ${V} to either "y" or ""
-IS_V := ${TRUTHY,${V}}
+export XV=${TRUTHY,${V}}
 
 # Suppress output unless V=1
 Q, := @
-Q  := ${Q,${IS_V}}
+Q  := ${Q,${XV}}
 
 # Show full commands with `make V=1`, otherwise short summaries
-MSG = @msg() { \
-          MSG="$$1"; \
-          shift; \
-          test "${IS_V}" || printf '%s\n' "$$MSG"; \
-          test "$${1:-}" || return 0; \
-          test "${IS_V}" && printf '%s\n' "$$*"; \
-          "$$@"; \
-      }; \
-      msg
-
-# Maximum width of a short message, to align the ✔/✘
-MSG_WIDTH := 30
+MSG = @build/msg.sh
 
 # cat a file if V=1
 VCAT,y := @cat
 VCAT,  := @:
-VCAT   := ${VCAT,${IS_V}}
+VCAT   := ${VCAT,${XV}}
 
 # All external dependencies
 ALL_PKGS := \