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LDFLAGS: add -Wl,--as-needed. reduces .so dependencies
[i3/i3] / common.mk
1 UNAME=$(shell uname)
2 DEBUG=1
3 COVERAGE=0
4 INSTALL=install
5 ifndef PREFIX
6   PREFIX=/usr
7 endif
8 ifndef SYSCONFDIR
9   ifeq ($(PREFIX),/usr)
10     SYSCONFDIR=/etc
11   else
12     SYSCONFDIR=$(PREFIX)/etc
13   endif
14 endif
15 TERM_EMU=xterm
16 # The escaping is absurd, but we need to escape for shell, sed, make, define
17 GIT_VERSION:="$(shell git describe --tags --always) ($(shell git log --pretty=format:%cd --date=short -n1), branch $(shell [ -f $(TOPDIR)/.git/HEAD ] && sed 's/ref: refs\/heads\/\(.*\)/\\\\\\"\1\\\\\\"/g' $(TOPDIR)/.git/HEAD || echo 'unknown'))"
18 VERSION:=$(shell git describe --tags --abbrev=0)
19
20 ifeq ($(shell which pkg-config 2>/dev/null 1>/dev/null || echo 1),1)
21 $(error "pkg-config was not found")
22 endif
23
24 # An easier way to get CFLAGS and LDFLAGS falling back in case there's
25 # no pkg-config support for certain libraries
26 cflags_for_lib = $(shell pkg-config --silence-errors --cflags $(1))
27 ldflags_for_lib = $(shell pkg-config --exists $(1) && pkg-config --libs $(1) || echo -l$(2))
28
29 CFLAGS += -std=c99
30 CFLAGS += -pipe
31 CFLAGS += -Wall
32 # unused-function, unused-label, unused-variable are turned on by -Wall
33 # We don’t want unused-parameter because of the use of many callbacks
34 CFLAGS += -Wunused-value
35 CFLAGS += -Iinclude
36 CFLAGS += $(call cflags_for_lib, xcb-keysyms)
37 ifeq ($(shell pkg-config --exists xcb-util || echo 1),1)
38 CPPFLAGS += -DXCB_COMPAT
39 CFLAGS += $(call cflags_for_lib, xcb-atom)
40 CFLAGS += $(call cflags_for_lib, xcb-aux)
41 else
42 CFLAGS += $(call cflags_for_lib, xcb-util)
43 endif
44 CFLAGS += $(call cflags_for_lib, xcb-icccm)
45 CFLAGS += $(call cflags_for_lib, xcb-xinerama)
46 CFLAGS += $(call cflags_for_lib, xcb-randr)
47 CFLAGS += $(call cflags_for_lib, xcb)
48 CFLAGS += $(call cflags_for_lib, xcursor)
49 CFLAGS += $(call cflags_for_lib, x11)
50 CFLAGS += $(call cflags_for_lib, yajl)
51 CFLAGS += $(call cflags_for_lib, libev)
52 CPPFLAGS += -DI3_VERSION=\"${GIT_VERSION}\"
53 CPPFLAGS += -DSYSCONFDIR=\"${SYSCONFDIR}\"
54 CPPFLAGS += -DTERM_EMU=\"$(TERM_EMU)\"
55
56 LIBS += -lm
57 LIBS += $(call ldflags_for_lib, xcb-event, xcb-event)
58 LIBS += $(call ldflags_for_lib, xcb-keysyms, xcb-keysyms)
59 ifeq ($(shell pkg-config --exists xcb-util || echo 1),1)
60 LIBS += $(call ldflags_for_lib, xcb-atom, xcb-atom)
61 LIBS += $(call ldflags_for_lib, xcb-aux, xcb-aux)
62 else
63 LIBS += $(call ldflags_for_lib, xcb-util)
64 endif
65 LIBS += $(call ldflags_for_lib, xcb-icccm, xcb-icccm)
66 LIBS += $(call ldflags_for_lib, xcb-xinerama, xcb-xinerama)
67 LIBS += $(call ldflags_for_lib, xcb-randr, xcb-randr)
68 LIBS += $(call ldflags_for_lib, xcb, xcb)
69 LIBS += $(call ldflags_for_lib, xcursor, Xcursor)
70 LIBS += $(call ldflags_for_lib, x11, X11)
71 LIBS += $(call ldflags_for_lib, yajl, yajl)
72 LIBS += $(call ldflags_for_lib, libev, ev)
73
74 LDFLAGS += -Wl,--as-needed
75
76 ifeq ($(UNAME),NetBSD)
77 # We need -idirafter instead of -I to prefer the system’s iconv over GNU libiconv
78 CFLAGS += -idirafter /usr/pkg/include
79 LDFLAGS += -Wl,-rpath,/usr/local/lib -Wl,-rpath,/usr/pkg/lib
80 endif
81
82 ifeq ($(UNAME),OpenBSD)
83 CFLAGS += -I${X11BASE}/include
84 LIBS += -liconv
85 LDFLAGS += -L${X11BASE}/lib
86 endif
87
88 ifeq ($(UNAME),FreeBSD)
89 LIBS += -liconv
90 endif
91
92 ifeq ($(UNAME),Darwin)
93 LIBS += -liconv
94 endif
95
96 # Fallback for libyajl 1 which did not include yajl_version.h. We need
97 # YAJL_MAJOR from that file to decide which code path should be used.
98 CFLAGS += -idirafter $(TOPDIR)/yajl-fallback
99
100 ifneq (,$(filter Linux GNU GNU/%, $(UNAME)))
101 CPPFLAGS += -D_GNU_SOURCE
102 endif
103
104 ifeq ($(DEBUG),1)
105 # Extended debugging flags, macros shall be available in gcc
106 CFLAGS += -gdwarf-2
107 CFLAGS += -g3
108 else
109 CFLAGS += -O2
110 CFLAGS += -freorder-blocks-and-partition
111 endif
112
113 ifeq ($(COVERAGE),1)
114 CFLAGS += -fprofile-arcs -ftest-coverage
115 LIBS += -lgcov
116 endif
117
118 # Don’t print command lines which are run
119 .SILENT:
120
121 # Always remake the following targets
122 .PHONY: install clean dist distclean
123