Commit 33870d7be233e4eee59ca5a082df528143f65e00
2018-04-12T16:19:40
Make the build logic more robust for BSD systems This properly sets MAKE on BSDs to gmake rather than make, which refers to the incompatible BSD Make. Further, it betters detection of Clang as the default compiler, which is the case on FreeBSD 11.0+ and OpenBSD 6.0+, and it fixes the unrecognized call to arch on FreeBSD.
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diff --git a/makefile_include.mk b/makefile_include.mk
index f21e7aa..c4ba8db 100644
--- a/makefile_include.mk
+++ b/makefile_include.mk
@@ -17,15 +17,34 @@ ifndef CROSS_COMPILE
CROSS_COMPILE=
endif
-ifeq ($(CC),cc)
- CC = $(CROSS_COMPILE)gcc
+# We only need to go through this dance of determining the right compiler if we're using
+# cross compilation, otherwise $(CC) is fine as-is.
+ifneq (,$(CROSS_COMPILE))
+ifeq ($(origin CC),default)
+CSTR := "\#ifdef __clang__\nCLANG\n\#endif\n"
+ifeq ($(PLATFORM),FreeBSD)
+ # XXX: FreeBSD needs extra escaping for some reason
+ CSTR := $$$(CSTR)
endif
+ifneq (,$(shell echo $(CSTR) | $(CC) -E - | grep CLANG))
+ CC := $(CROSS_COMPILE)clang
+else
+ CC := $(CROSS_COMPILE)gcc
+endif # Clang
+endif # cc is Make's default
+endif # CROSS_COMPILE non-empty
+
LD=$(CROSS_COMPILE)ld
AR=$(CROSS_COMPILE)ar
RANLIB=$(CROSS_COMPILE)ranlib
ifndef MAKE
- MAKE=make
+# BSDs refer to GNU Make as gmake
+ifneq (,$(findstring $(PLATFORM),FreeBSD OpenBSD DragonFly NetBSD))
+ MAKE=gmake
+else
+ MAKE=make
+endif
endif
CFLAGS += -I./ -Wall -Wsign-compare -Wextra -Wshadow
@@ -67,8 +86,14 @@ ifeq ($(PLATFORM), Darwin)
CFLAGS += -Wno-nullability-completeness
endif
+ifeq ($(PLATFORM),FreeBSD)
+ _ARCH := $(shell sysctl -b hw.machine_arch)
+else
+ _ARCH := $(shell arch)
+endif
+
# adjust coverage set
-ifneq ($(filter $(shell arch), i386 i686 x86_64 amd64 ia64),)
+ifneq ($(filter $(_ARCH), i386 i686 x86_64 amd64 ia64),)
COVERAGE = test_standalone timing
COVERAGE_APP = ./test && ./timing
else