git.zerfleddert.de Git - amt/blob - mk/Autoconf.mk

   1 #
   2 # simple autoconf system for GNU make
   3 #
   4 # (c) 2002-2006 Gerd Hoffmann <kraxel@suse.de>
   5 #
   6 # credits for creating this one go to the autotools people because
   7 # they managed it to annoy lots of developers and users (including
   8 # me) with version incompatibilities.
   9 #
  10 # This file is public domain.  No warranty.  If it breaks you keep
  11 # both pieces.
  12 #
  13 ########################################################################
  14
  15 # verbose yes/no
  16 verbose         ?= no
  17
  18 # some stuff used by the tests
  19 ifneq ($(verbose),no)
  20   # verbose (for debug)
  21   ac_init       = echo "checking $(1) ... " >&2; rc=no
  22   ac_b_cmd      = echo "run: $(1)" >&2; $(1) >/dev/null && rc=yes
  23   ac_s_cmd      = echo "run: $(1)" >&2; rc=`$(1)`
  24   ac_fini       = echo "... result is $${rc}" >&2; echo >&2; echo "$${rc}"
  25 else
  26   # normal
  27   ac_init       = echo -n "checking $(1) ... " >&2; rc=no
  28   ac_b_cmd      = $(1) >/dev/null 2>&1 && rc=yes
  29   ac_s_cmd      = rc=`$(1) 2>/dev/null`
  30   ac_fini       = echo "$${rc}" >&2; echo "$${rc}"
  31 endif
  32
  33 # some helpers to build cflags and related variables
  34 ac_def_cflags_1 = $(if $(filter yes,$($(1))),-D$(1))
  35 ac_lib_cflags   = $(foreach lib,$(1),$(call ac_def_cflags_1,HAVE_LIB$(lib)))
  36 ac_inc_cflags   = $(foreach inc,$(1),$(call ac_def_cflags_1,HAVE_$(inc)))
  37 ac_lib_mkvar_1  = $(if $(filter yes,$(HAVE_LIB$(1))),$($(1)_$(2)))
  38 ac_lib_mkvar    = $(foreach lib,$(1),$(call ac_lib_mkvar_1,$(lib),$(2)))
  39
  40
  41 ########################################################################
  42 # the tests ...
  43
  44 # get uname
  45 ac_uname = $(shell \
  46         $(call ac_init,for system);\
  47         $(call ac_s_cmd,uname -s | tr 'A-Z' 'a-z');\
  48         $(call ac_fini))
  49
  50 # check for some header file
  51 # args: header file
  52 ac_header = $(shell \
  53         $(call ac_init,for $(1));\
  54         $(call ac_b_cmd,echo '\#include <$(1)>' |\
  55                 $(CC) $(CFLAGS) -E -);\
  56         $(call ac_fini))
  57
  58 # check for some function
  59 # args: function [, additional libs ]
  60 ac_func = $(shell \
  61         $(call ac_init,for $(1));\
  62         echo 'void $(1)(void); int main(void) {$(1)();return 0;}' \
  63                 > __actest.c;\
  64         $(call ac_b_cmd,$(CC) $(CFLAGS) $(LDFLAGS) -o \
  65                 __actest __actest.c $(2));\
  66         rm -f __actest __actest.c;\
  67         $(call ac_fini))
  68
  69 # check for some library
  70 # args: function, library [, additional libs ]
  71 ac_lib = $(shell \
  72         $(call ac_init,for $(1) in $(2));\
  73         echo 'void $(1)(void); int main(void) {$(1)();return 0;}' \
  74                 > __actest.c;\
  75         $(call ac_b_cmd,$(CC) $(CFLAGS) $(LDFLAGS) -o \
  76                 __actest __actest.c -l$(2) $(3));\
  77         rm -f __actest __actest.c;\
  78         $(call ac_fini))
  79
  80 # check if some compiler flag works
  81 # args: compiler flag
  82 ac_cflag = $(shell \
  83         $(call ac_init,if $(CC) supports $(1));\
  84         echo 'int main() {return 0;}' > __actest.c;\
  85         $(call ac_b_cmd,$(CC) $(CFLAGS) $(1) $(LDFLAGS) -o \
  86                 __actest __actest.c);\
  87         rm -f __actest __actest.c;\
  88         $(call ac_fini))
  89
  90 # check for some binary
  91 # args: binary name
  92 ac_binary = $(shell \
  93         $(call ac_init,for $(1));\
  94         $(call ac_s_cmd,which $(1));\
  95         bin="$$rc";rc="no";\
  96         $(call ac_b_cmd,test -x "$$$$bin");\
  97         $(call ac_fini))
  98
  99 # check if lib64 is used
 100 ac_lib64 = $(shell \
 101         $(call ac_init,for libdir name);\
 102         $(call ac_s_cmd,$(CC) -print-search-dirs | grep -q lib64 &&\
 103                 echo "lib64" || echo "lib");\
 104         $(call ac_fini))
 105
 106 # check for x11 ressource dir prefix
 107 ac_resdir = $(shell \
 108         $(call ac_init,for X11 app-defaults prefix);\
 109         $(call ac_s_cmd, for dir in \
 110                 /etc/X11/app-defaults \
 111                 /usr/X11R6/lib/X11/app-defaults \
 112                 /usr/share/X11/app-defaults \
 113                 /usr/lib/X11/app-defaults \
 114                 ; do test -d "$$dir" || continue;\
 115                 dirname "$$dir"; break; done);\
 116         $(call ac_fini))
 117
 118 # check if package is installed, via pkg-config
 119 # args: pkg name
 120 ac_pkg_config = $(shell \
 121         $(call ac_init,for $(1) (using pkg-config));\
 122         $(call ac_b_cmd, pkg-config $(1));\
 123         $(call ac_fini))
 124
 125
 126 ########################################################################
 127 # build Make.config
 128
 129 define newline
 130
 131
 132 endef
 133 make-config-q   = $(subst $(newline),\n,$(make-config))
 134
 135 ifeq ($(filter config,$(MAKECMDGOALS)),config)
 136 .PHONY: Make.config
 137   LIB := $(call ac_lib64)
 138 else
 139   LIB ?= $(call ac_lib64)
 140   LIB := $(LIB)
 141 endif
 142 .PHONY: config
 143 config: Make.config
 144         @true
 145
 146 Make.config: $(srcdir)/GNUmakefile
 147         @echo -e "$(make-config-q)" > $@
 148         @echo
 149         @echo "Make.config written, edit if needed"
 150         @echo