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build: Add FreeBSD and non-GNU linker compatibility

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Add compatibility fixes for non-GNU compilers and linkers by testing
versions before using certain flags.  In particular this fixes make build
problems on FreeBSD.

Generated-by: Claude Code 1.0.65 (claude-sonnet-4@20250514)
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2025-08-01 15:35:06 +10:00
parent 4132ac08ba
commit 2ad738722b
1 changed files with 12 additions and 3 deletions
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15
Makefile
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@ -24,7 +24,10 @@ ASSUME_MASK ?= 0
CPPFLAGS = -I libfdt -I . -DFDT_ASSUME_MASK=$(ASSUME_MASK) CPPFLAGS = -I libfdt -I . -DFDT_ASSUME_MASK=$(ASSUME_MASK)
WARNINGS = -Wall -Wpointer-arith -Wcast-qual -Wnested-externs -Wsign-compare \ WARNINGS = -Wall -Wpointer-arith -Wcast-qual -Wnested-externs -Wsign-compare \
-Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls -Wshadow \ -Wstrict-prototypes -Wmissing-prototypes -Wredundant-decls -Wshadow \
-Wsuggest-attribute=format -Wwrite-strings -Wwrite-strings
ifeq ($(shell $(CC) --version | grep -q gcc && echo gcc),gcc)
WARNINGS += -Wsuggest-attribute=format
endif
CFLAGS = -g -Os $(SHAREDLIB_CFLAGS) -Werror $(WARNINGS) $(EXTRA_CFLAGS) CFLAGS = -g -Os $(SHAREDLIB_CFLAGS) -Werror $(WARNINGS) $(EXTRA_CFLAGS)
BISON = bison BISON = bison
@ -65,6 +68,8 @@ else
CFLAGS += $(shell $(PKG_CONFIG) --cflags yaml-0.1) CFLAGS += $(shell $(PKG_CONFIG) --cflags yaml-0.1)
endif endif
HAS_VERSION_SCRIPT := $(shell echo 'int main(){}' | $(CC) -Wl,--version-script=/dev/null -x c - -o /dev/null 2>/dev/null && echo y)
ifeq ($(HOSTOS),darwin) ifeq ($(HOSTOS),darwin)
SHAREDLIB_EXT = dylib SHAREDLIB_EXT = dylib
SHAREDLIB_CFLAGS = -fPIC SHAREDLIB_CFLAGS = -fPIC
@ -72,11 +77,15 @@ SHAREDLIB_LDFLAGS = -fPIC -dynamiclib -Wl,-install_name -Wl,
else ifeq ($(HOSTOS),$(filter $(HOSTOS),msys cygwin)) else ifeq ($(HOSTOS),$(filter $(HOSTOS),msys cygwin))
SHAREDLIB_EXT = so SHAREDLIB_EXT = so
SHAREDLIB_CFLAGS = SHAREDLIB_CFLAGS =
SHAREDLIB_LDFLAGS = -shared -Wl,--version-script=$(LIBFDT_version) -Wl,-soname, SHAREDLIB_LDFLAGS = -shared -Wl,-soname,
else else
SHAREDLIB_EXT = so SHAREDLIB_EXT = so
SHAREDLIB_CFLAGS = -fPIC SHAREDLIB_CFLAGS = -fPIC
SHAREDLIB_LDFLAGS = -fPIC -shared -Wl,--version-script=$(LIBFDT_version) -Wl,-soname, SHAREDLIB_LDFLAGS = -fPIC -shared -Wl,-soname,
endif
ifeq ($(HAS_VERSION_SCRIPT),y)
SHAREDLIB_LDFLAGS += -Wl,--version-script=$(LIBFDT_version)
endif endif
# #