Make build system respect FORCE_COLOR and NO_COLOR settings (#56346)

Follow up to #53742, but for the build system.  CC: @omus.

Make.inc

@@ -118,6 +118,51 @@ SPACE:=$(eval) $(eval)
 export LC_ALL=C
 export LANG=C
 
+# Respect `FORCE_COLOR` environment variable: <https://force-color.org/>.
+ifndef FORCE_COLOR
+FORCE_COLOR := ""
+endif
+
+# Respect `NO_COLOR` environment variable: <https://no-color.org/>.
+ifndef NO_COLOR
+NO_COLOR := ""
+endif
+
+# When both `FORCE_COLOR` and `NO_COLOR` are defined, the former has precedence.
+ifneq ($(FORCE_COLOR), "")
+NO_COLOR = ""
+endif
+
+WARNCOLOR:="\033[33;1m"
+ENDCOLOR:="\033[0m"
+
+CCCOLOR:="\033[34m"
+LINKCOLOR:="\033[34;1m"
+PERLCOLOR:="\033[35m"
+FLISPCOLOR:="\033[32m"
+JULIACOLOR:="\033[32;1m"
+DTRACECOLOR:="\033[32;1m"
+
+SRCCOLOR:="\033[33m"
+BINCOLOR:="\033[37;1m"
+JULCOLOR:="\033[34;1m"
+
+ifneq ($(NO_COLOR), "")
+WARNCOLOR:=""
+ENDCOLOR:=""
+
+CCCOLOR:=""
+LINKCOLOR:=""
+PERLCOLOR:=""
+FLISPCOLOR:=""
+JULIACOLOR:=""
+DTRACECOLOR:=""
+
+SRCCOLOR:=""
+BINCOLOR:=""
+JULCOLOR:=""
+endif
+
 # We need python for things like BB triplet recognition and relative path computation.
 # We don't really care about version, generally, so just find something that works:
 PYTHON := "$(shell which python 2>/dev/null || which python3 2>/dev/null || which python2 2>/dev/null || echo "{python|python3|python2} not found")"
@@ -140,7 +185,7 @@ ifeq ($(BUILDROOT),)
 ifeq ("$(origin O)", "command line")
   BUILDROOT := $(abspath $O)
   BUILDDIR := $(abspath $(BUILDROOT)/$(call rel_path,$(JULIAHOME),$(SRCDIR)))
-  $(info $(shell printf '\033[32;1mBuilding into $(BUILDROOT)\033[0m')) # use printf to expand the escape sequences
+  $(info $(shell printf '$(JULIACOLOR)Building into $(BUILDROOT)$(ENDCOLOR)')) # use printf to expand the escape sequences
 else
   BUILDROOT:=$(JULIAHOME)
 endif
@@ -1759,24 +1804,10 @@ ifndef VERBOSE
 VERBOSE := 0
 endif
 
-WARNCOLOR:="\033[33;1m"
-ENDCOLOR:="\033[0m"
-
 ifeq ($(VERBOSE), 0)
 
 QUIET_MAKE = -s
 
-CCCOLOR:="\033[34m"
-LINKCOLOR:="\033[34;1m"
-PERLCOLOR:="\033[35m"
-FLISPCOLOR:="\033[32m"
-JULIACOLOR:="\033[32;1m"
-DTRACECOLOR:="\033[32;1m"
-
-SRCCOLOR:="\033[33m"
-BINCOLOR:="\033[37;1m"
-JULCOLOR:="\033[34;1m"
-
 GOAL=$(subst ','\'',$(subst $(abspath $(JULIAHOME))/,,$(abspath $@)))
 
 PRINT_CC = printf '    %b %b\n' $(CCCOLOR)CC$(ENDCOLOR) $(SRCCOLOR)$(GOAL)$(ENDCOLOR); $(1)
@@ -1797,7 +1828,7 @@ PRINT_FLISP = echo '$(subst ','\'',$(1))'; $(1)
 PRINT_JULIA = echo '$(subst ','\'',$(1))'; $(1)
 PRINT_DTRACE = echo '$(subst ','\'',$(1))'; $(1)
 
-endif
+endif # VERBOSE
 
 # Makefile debugging trick:
 # call print-VARIABLE to see the runtime value of any variable

Makefile

@@ -650,7 +650,7 @@ testall1: check-whitespace $(JULIA_BUILD_MODE)
 
 test-%: check-whitespace $(JULIA_BUILD_MODE) .FORCE
 	@([ $$(( $$(date +%s) - $$(date -r $(build_private_libdir)/sys.$(SHLIB_EXT) +%s) )) -le 100 ] && \
-		printf '\033[93m    HINT The system image was recently rebuilt. Are you aware of the test-revise-* targets? See CONTRIBUTING.md. \033[0m\n') || true
+		printf '$(WARNCOLOR)    HINT The system image was recently rebuilt. Are you aware of the test-revise-* targets? See CONTRIBUTING.md. $(ENDCOLOR)\n') || true
 	@$(MAKE) $(QUIET_MAKE) -C $(BUILDROOT)/test $* JULIA_BUILD_MODE=$(JULIA_BUILD_MODE)
 
 test-revise-%: .FORCE

NEWS.md

@@ -57,8 +57,8 @@ Command-line option changes
 * The `-m/--module` flag can be passed to run the `main` function inside a package with a set of arguments.
   This `main` function should be declared using `@main` to indicate that it is an entry point.
 * Enabling or disabling color text in Julia can now be controlled with the
-[`NO_COLOR`](https://no-color.org/) or [`FORCE_COLOR`](https://force-color.org/) environment
-variables. ([#53742]).
+  [`NO_COLOR`](https://no-color.org/) or [`FORCE_COLOR`](https://force-color.org/) environment
+  variables. These variables are also honored by Julia's build system ([#53742], [#56346]).
 * `--project=@temp` starts Julia with a temporary environment.
 * New `--trace-compile-timing` option to report how long each method reported by `--trace-compile` took
   to compile, in ms. ([#54662])