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Makefile: re-use Git's Makefile where possible
Git does quite a lot of platform-specific detection in its Makefile, which can result in it defining preprocessor variables that are used in its header files. If CGit does not define the same variables it can result in different sizes of some structures in different places in the same application. For example, on Solaris Git uses it's "compat" regex library which has a different sized regex_t structure than that available in the platform regex.h. This has a knock-on effect on the size of "struct rev_info" and leads to hard to diagnose runtime issues. In order to avoid all of this, introduce a "cgit.mk" file that includes Git's Makefile and make all of the existing logic apply to CGit's objects as well. This is slightly complicated because Git's Makefile must run in Git's directory, so all references to CGit files need to be prefixed with "../". In addition, OBJECTS is a simply expanded variable in Git's Makefile so we cannot just add our objects to it. Instead we must copy the two applicable rules into "cgit.mk". This has the advantage that we can split CGit-specific CFLAGS from Git's CFLAGS and hence avoid rebuilding all of Git whenever a CGit-specific value changes. Signed-off-by: John Keeping <john@keeping.me.uk> Acked-by: Jamie Couture <jamie.couture@gmail.com>
This commit is contained in:
John Keeping
Jason A. Donenfeld
parent
e1e0e038fd
commit
5f323c1ff4
1
.gitignore
vendored
1
.gitignore
vendored
@ -1,6 +1,7 @@
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# Files I don't care to see in git-status/commit
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cgit
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cgit.conf
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CGIT-CFLAGS
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VERSION
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cgitrc.5
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cgitrc.5.fo
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124
Makefile
124
Makefile
@ -23,13 +23,6 @@ DOC_MAN5 = $(patsubst %.txt,%,$(MAN5_TXT))
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DOC_HTML = $(patsubst %.txt,%.html,$(MAN_TXT))
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DOC_PDF = $(patsubst %.txt,%.pdf,$(MAN_TXT))
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# Define NO_STRCASESTR if you don't have strcasestr.
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#
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# Define NO_OPENSSL to disable linking with OpenSSL and use bundled SHA1
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# implementation (slower).
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#
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# Define NEEDS_LIBICONV if linking with libc is not enough (eg. Darwin).
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#
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# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
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# do not support the 'size specifiers' introduced by C99, namely ll, hh,
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# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
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@ -38,23 +31,13 @@ DOC_PDF = $(patsubst %.txt,%.pdf,$(MAN_TXT))
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#-include config.mak
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#
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# Platform specific tweaks
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#
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VERSION: force-version
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@./gen-version.sh "$(CGIT_VERSION)"
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-include VERSION
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uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
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uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not')
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uname_R := $(shell sh -c 'uname -r 2>/dev/null || echo not')
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#
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# Let the user override the above settings.
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#
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-include cgit.conf
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export CGIT_SCRIPT_NAME CGIT_SCRIPT_PATH CGIT_DATA_PATH CGIT_CONFIG CACHE_ROOT
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#
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# Define a way to invoke make in subdirs quietly, shamelessly ripped
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# from git.git
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@ -69,8 +52,6 @@ NO_SUBDIR = :
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endif
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ifndef V
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QUIET_CC = @echo ' ' CC $@;
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QUIET_LINK = @echo ' ' LINK $@;
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QUIET_SUBDIR0 = +@subdir=
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QUIET_SUBDIR1 = ;$(NO_SUBDIR) echo ' ' SUBDIR $$subdir; \
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$(MAKE) $(PRINT_DIR) -C $$subdir
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@ -78,107 +59,12 @@ ifndef V
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export V
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endif
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LDFLAGS ?=
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CFLAGS ?= -g -Wall
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CFLAGS += -Igit
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CFLAGS += -DSHA1_HEADER='$(SHA1_HEADER)'
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CFLAGS += -DCGIT_VERSION='"$(CGIT_VERSION)"'
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CFLAGS += -DCGIT_CONFIG='"$(CGIT_CONFIG)"'
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CFLAGS += -DCGIT_SCRIPT_NAME='"$(CGIT_SCRIPT_NAME)"'
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CFLAGS += -DCGIT_CACHE_ROOT='"$(CACHE_ROOT)"'
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ifeq ($(uname_O),Cygwin)
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NO_STRCASESTR = YesPlease
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NEEDS_LIBICONV = YesPlease
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endif
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ifeq ($(uname_S),$(filter $(uname_S),FreeBSD OpenBSD))
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# Apparantly libiconv is installed in /usr/local on BSD
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LDFLAGS += -L/usr/local/lib
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CFLAGS += -I/usr/local/include
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NEEDS_LIBICONV = yes
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endif
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GIT_OPTIONS = prefix=/usr NO_GETTEXT=1
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OBJECTS =
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ifdef NO_ICONV
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CFLAGS += -DNO_ICONV
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endif
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ifdef NO_STRCASESTR
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CFLAGS += -DNO_STRCASESTR
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endif
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ifdef NO_C99_FORMAT
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CFLAGS += -DNO_C99_FORMAT
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endif
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ifdef NO_OPENSSL
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CFLAGS += -DNO_OPENSSL
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GIT_OPTIONS += NO_OPENSSL=1
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else
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LDLIBS += -lcrypto
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endif
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ifdef NEEDS_LIBICONV
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LDLIBS += -liconv
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endif
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LDLIBS += git/libgit.a git/xdiff/lib.a -lz -lpthread
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OBJECTS += cgit.o
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OBJECTS += cache.o
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OBJECTS += cmd.o
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OBJECTS += configfile.o
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OBJECTS += html.o
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OBJECTS += parsing.o
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OBJECTS += scan-tree.o
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OBJECTS += shared.o
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OBJECTS += ui-atom.o
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OBJECTS += ui-blob.o
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OBJECTS += ui-clone.o
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OBJECTS += ui-commit.o
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OBJECTS += ui-diff.o
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OBJECTS += ui-log.o
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OBJECTS += ui-patch.o
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OBJECTS += ui-plain.o
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OBJECTS += ui-refs.o
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OBJECTS += ui-repolist.o
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OBJECTS += ui-shared.o
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OBJECTS += ui-snapshot.o
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OBJECTS += ui-ssdiff.o
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OBJECTS += ui-stats.o
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OBJECTS += ui-summary.o
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OBJECTS += ui-tag.o
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OBJECTS += ui-tree.o
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OBJECTS += vector.o
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dep_files := $(foreach f,$(OBJECTS),$(dir $f).deps/$(notdir $f).d)
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dep_dirs := $(addsuffix .deps,$(sort $(dir $OBJECTS)))
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$(dep_dirs):
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@mkdir -p $@
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missing_dep_dirs := $(filter-out $(wildcard $(dep_dirs)),$(dep_dirs))
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dep_file = $(dir $@).deps/$(notdir $@).d
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dep_args = -MF $(dep_file) -MMD -MP
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.SUFFIXES:
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$(OBJECTS): %.o: %.c $(missing_dep_dirs)
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$(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(CFLAGS) $<
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dep_files_present := $(wildcard $(dep_files))
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ifneq ($(dep_files_present),)
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include $(dep_files_present)
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endif
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all:: cgit
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cgit: VERSION $(OBJECTS) libgit
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$(QUIET_LINK)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJECTS) $(LDLIBS)
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libgit:
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$(QUIET_SUBDIR0)git $(QUIET_SUBDIR1) NO_CURL=1 $(GIT_OPTIONS) libgit.a
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$(QUIET_SUBDIR0)git $(QUIET_SUBDIR1) NO_CURL=1 $(GIT_OPTIONS) xdiff/lib.a
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cgit:
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$(QUIET_SUBDIR0)git $(QUIET_SUBDIR1) -f ../cgit.mk ../cgit NO_CURL=1
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test: all
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$(QUIET_SUBDIR0)tests $(QUIET_SUBDIR1) all
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@ -259,7 +145,7 @@ get-git:
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tags:
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$(QUIET_TAGS)find . -name '*.[ch]' | xargs ctags
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.PHONY: all cgit get-git libgit force-version
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.PHONY: all cgit get-git
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.PHONY: clean clean-doc cleanall
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.PHONY: doc doc-html doc-man doc-pdf
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.PHONY: install install-doc install-html install-man install-pdf
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74
cgit.mk
Normal file
74
cgit.mk
Normal file
@ -0,0 +1,74 @@
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# This Makefile is run in the "git" directory in order to re-use Git's
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# build variables and operating system detection. Hence all files in
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# CGit's directory must be prefixed with "../".
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include Makefile
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CGIT_PREFIX = ../
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# The CGIT_* variables are inherited when this file is called from the
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# main Makefile - they are defined there.
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$(CGIT_PREFIX)VERSION: force-version
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@cd $(CGIT_PREFIX) && ./gen-version.sh "$(CGIT_VERSION)"
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-include $(CGIT_PREFIX)VERSION
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.PHONY: force-version
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# CGIT_CFLAGS is a separate variable so that we can track it separately
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# and avoid rebuilding all of Git when these variables change.
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CGIT_CFLAGS += -DCGIT_VERSION='"$(CGIT_VERSION)"'
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CGIT_CFLAGS += -DCGIT_CONFIG='"$(CGIT_CONFIG)"'
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CGIT_CFLAGS += -DCGIT_SCRIPT_NAME='"$(CGIT_SCRIPT_NAME)"'
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CGIT_CFLAGS += -DCGIT_CACHE_ROOT='"$(CACHE_ROOT)"'
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ifdef NO_C99_FORMAT
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CFLAGS += -DNO_C99_FORMAT
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endif
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CGIT_OBJ_NAMES += cgit.o
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CGIT_OBJ_NAMES += cache.o
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CGIT_OBJ_NAMES += cmd.o
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CGIT_OBJ_NAMES += configfile.o
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CGIT_OBJ_NAMES += html.o
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CGIT_OBJ_NAMES += parsing.o
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CGIT_OBJ_NAMES += scan-tree.o
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CGIT_OBJ_NAMES += shared.o
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CGIT_OBJ_NAMES += ui-atom.o
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CGIT_OBJ_NAMES += ui-blob.o
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CGIT_OBJ_NAMES += ui-clone.o
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CGIT_OBJ_NAMES += ui-commit.o
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CGIT_OBJ_NAMES += ui-diff.o
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CGIT_OBJ_NAMES += ui-log.o
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CGIT_OBJ_NAMES += ui-patch.o
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CGIT_OBJ_NAMES += ui-plain.o
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CGIT_OBJ_NAMES += ui-refs.o
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CGIT_OBJ_NAMES += ui-repolist.o
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CGIT_OBJ_NAMES += ui-shared.o
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CGIT_OBJ_NAMES += ui-snapshot.o
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CGIT_OBJ_NAMES += ui-ssdiff.o
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CGIT_OBJ_NAMES += ui-stats.o
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CGIT_OBJ_NAMES += ui-summary.o
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CGIT_OBJ_NAMES += ui-tag.o
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CGIT_OBJ_NAMES += ui-tree.o
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CGIT_OBJ_NAMES += vector.o
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CGIT_OBJS := $(addprefix $(CGIT_PREFIX),$(CGIT_OBJ_NAMES))
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ifeq ($(wildcard $(CGIT_PREFIX).depend),)
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missing_dep_dirs += $(CGIT_PREFIX).depend
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endif
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$(CGIT_PREFIX).depend:
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@mkdir -p $@
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$(CGIT_PREFIX)CGIT-CFLAGS: FORCE
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@FLAGS='$(subst ','\'',$(CGIT_CFLAGS))'; \
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if test x"$$FLAGS" != x"`cat ../CGIT-CFLAGS 2>/dev/null`" ; then \
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echo 1>&2 " * new CGit build flags"; \
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echo "$$FLAGS" >$(CGIT_PREFIX)CGIT-CFLAGS; \
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fi
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$(CGIT_OBJS): %.o: %.c GIT-CFLAGS $(CGIT_PREFIX)CGIT-CFLAGS $(missing_dep_dirs)
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$(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $(EXTRA_CPPFLAGS) $(CGIT_CFLAGS) $<
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$(CGIT_PREFIX)cgit: $(CGIT_OBJS) GIT-LDFLAGS $(GITLIBS)
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$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)
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