From d5a0c023a7f3deefd471d7b97ef4fa40ed374645 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 10 Feb 2016 09:47:27 +0100 Subject: [PATCH] build system fixes This touches up the homebrewed build system to work much better "out of the box" for people. Specifically: - allow toolchain vars to be set via environment - CC / BUILD_CC / AR / RANLIB - CFLAGS / CPPFLAGS / LDFLAGS - split CPPFLAGS out of CFLAGS - break -fPIC out of global CFLAGS and only use where needed - use LDLIBS for libraries, not LDFLAGS Signed-off-by: Mike Frysinger Forward ported from libcap-2.24 to libcap-2.25 Signed-off-by: Lars Wendler --- Make.Rules | 26 ++++++++++++++------------ libcap/Makefile | 7 ++++--- pam_cap/Makefile | 8 +++++--- progs/Makefile | 2 +- 4 files changed, 24 insertions(+), 19 deletions(-) diff --git a/Make.Rules b/Make.Rules index 8347b26..d7196ef 100644 --- a/Make.Rules +++ b/Make.Rules @@ -45,28 +45,30 @@ MINOR=25 # Compilation specifics -KERNEL_HEADERS := $(topdir)/libcap/include/uapi -IPATH += -fPIC -I$(KERNEL_HEADERS) -I$(topdir)/libcap/include - -CC := gcc -CFLAGS := -O2 -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -BUILD_CC := $(CC) -BUILD_CFLAGS := $(CFLAGS) $(IPATH) -AR := ar -RANLIB := ranlib +CC ?= gcc +CFLAGS ?= -O2 +BUILD_CC ?= $(CC) +BUILD_CFLAGS ?= $(CFLAGS) +AR ?= ar +RANLIB ?= ranlib DEBUG = -g #-DDEBUG WARNINGS=-Wall -Wwrite-strings \ -Wpointer-arith -Wcast-qual -Wcast-align \ -Wstrict-prototypes -Wmissing-prototypes \ -Wnested-externs -Winline -Wshadow LD=$(CC) -Wl,-x -shared -LDFLAGS := #-g +LDFLAGS ?= #-g BUILD_GPERF := $(shell which gperf >/dev/null 2>/dev/null && echo yes) -SYSTEM_HEADERS = /usr/include +KERNEL_HEADERS = $(topdir)/libcap/include/uapi +LIBCAP_CPPFLAGS = -I$(KERNEL_HEADERS) -I$(topdir)/libcap/include +LIBCAP_CPPFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 +CPPFLAGS += $(LIBCAP_CPPFLAGS) +BUILD_CPPFLAGS += $(LIBCAP_CPPFLAGS) INCS=$(topdir)/libcap/include/sys/capability.h LDFLAGS += -L$(topdir)/libcap -CFLAGS += -Dlinux $(WARNINGS) $(DEBUG) +CPPFLAGS += -Dlinux +CFLAGS += $(WARNINGS) $(DEBUG) PAM_CAP := $(shell if [ -f /usr/include/security/pam_modules.h ]; then echo yes ; else echo no ; fi) INDENT := $(shell if [ -n "$$(which indent 2>/dev/null)" ]; then echo "| indent -kr" ; fi) DYNAMIC := $(shell if [ ! -d "$(topdir)/.git" ]; then echo yes; fi) diff --git a/libcap/Makefile b/libcap/Makefile index d189777..b99740f 100644 --- a/libcap/Makefile +++ b/libcap/Makefile @@ -17,6 +17,7 @@ OBJS=$(addsuffix .o, $(FILES)) MAJLIBNAME=$(LIBNAME).$(VERSION) MINLIBNAME=$(MAJLIBNAME).$(MINOR) GPERF_OUTPUT = _caps_output.gperf +CFLAGS += -fPIC all: $(MINLIBNAME) $(STALIBNAME) libcap.pc @@ -35,7 +36,7 @@ libcap.pc: libcap.pc.in $< >$@ _makenames: _makenames.c cap_names.list.h - $(BUILD_CC) $(BUILD_CFLAGS) $< -o $@ + $(BUILD_CC) $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) $< -o $@ cap_names.h: _makenames ./_makenames > cap_names.h @@ -57,10 +58,10 @@ $(MINLIBNAME): $(OBJS) ln -sf $(MAJLIBNAME) $(LIBNAME) %.o: %.c $(INCLS) - $(CC) $(CFLAGS) $(IPATH) -c $< -o $@ + $(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@ cap_text.o: cap_text.c $(USE_GPERF_OUTPUT) $(INCLS) - $(CC) $(CFLAGS) $(IPATH) $(INCLUDE_GPERF_OUTPUT) -c $< -o $@ + $(CC) $(CFLAGS) $(CPPFLAGS) $(INCLUDE_GPERF_OUTPUT) -c $< -o $@ install: all mkdir -p -m 0755 $(FAKEROOT)$(INCDIR)/sys diff --git a/pam_cap/Makefile b/pam_cap/Makefile index cc32fb6..6f07b6b 100644 --- a/pam_cap/Makefile +++ b/pam_cap/Makefile @@ -9,6 +9,8 @@ include ../Make.Rules # written (and you know why it fails), email me and explain why. Thanks! LDLIBS += -L../libcap -lcap +CFLAGS += -fPIC + all: pam_cap.so $(MAKE) testcompile @@ -17,13 +19,13 @@ install: all install -m 0755 pam_cap.so $(FAKEROOT)$(LIBDIR)/security pam_cap.so: pam_cap.o - $(LD) $(LDFLAGS) -o pam_cap.so $< $(LDLIBS) + $(LD) $(CFLAGS) $(LDFLAGS) -o pam_cap.so $< $(LDLIBS) pam_cap.o: pam_cap.c - $(CC) $(CFLAGS) $(IPATH) -c $< -o $@ + $(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@ testcompile: test.c pam_cap.o - $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $+ -lpam -ldl $(LDLIBS) + $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) -o $@ $+ -lpam -ldl $(LDLIBS) clean: rm -f *.o *.so testcompile *~ diff --git a/progs/Makefile b/progs/Makefile index c094a24..b9f0d3f 100644 --- a/progs/Makefile +++ b/progs/Makefile @@ -19,7 +19,7 @@ $(BUILD): %: %.o $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LDLIBS) %.o: %.c $(INCS) - $(CC) $(IPATH) $(CFLAGS) -c $< -o $@ + $(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@ install: all mkdir -p -m 0755 $(FAKEROOT)$(SBINDIR) -- 2.7.1