1# ===========================================================================
2#   http://www.gnu.org/software/autoconf-archive/ax_prog_cc_for_build.html
3# ===========================================================================
4#
5# SYNOPSIS
6#
7#   AX_PROG_CC_FOR_BUILD
8#
9# DESCRIPTION
10#
11#   This macro searches for a C compiler that generates native executables,
12#   that is a C compiler that surely is not a cross-compiler. This can be
13#   useful if you have to generate source code at compile-time like for
14#   example GCC does.
15#
16#   The macro sets the CC_FOR_BUILD and CPP_FOR_BUILD macros to anything
17#   needed to compile or link (CC_FOR_BUILD) and preprocess (CPP_FOR_BUILD).
18#   The value of these variables can be overridden by the user by specifying
19#   a compiler with an environment variable (like you do for standard CC).
20#
21#   It also sets BUILD_EXEEXT and BUILD_OBJEXT to the executable and object
22#   file extensions for the build platform, and GCC_FOR_BUILD to `yes' if
23#   the compiler we found is GCC. All these variables but GCC_FOR_BUILD are
24#   substituted in the Makefile.
25#
26# LICENSE
27#
28#   Copyright (c) 2008 Paolo Bonzini <bonzini@gnu.org>
29#   Copyright (c) 2008-2017 The strace developers.
30#
31#   Copying and distribution of this file, with or without modification, are
32#   permitted in any medium without royalty provided the copyright notice
33#   and this notice are preserved. This file is offered as-is, without any
34#   warranty.
35
36#serial 8
37#modified for strace project
38
39AU_ALIAS([AC_PROG_CC_FOR_BUILD], [AX_PROG_CC_FOR_BUILD])
40AC_DEFUN([AX_PROG_CC_FOR_BUILD], [dnl
41AC_REQUIRE([AC_PROG_CC])dnl
42AC_REQUIRE([AC_PROG_CPP])dnl
43AC_REQUIRE([AC_EXEEXT])dnl
44AC_REQUIRE([AC_CANONICAL_HOST])dnl
45
46dnl Use the standard macros, but make them use other variable names
47dnl
48pushdef([ac_cv_prog_CPP], ac_cv_build_prog_CPP)dnl
49pushdef([ac_cv_prog_gcc], ac_cv_build_prog_gcc)dnl
50pushdef([ac_cv_prog_cc_works], ac_cv_build_prog_cc_works)dnl
51pushdef([ac_cv_prog_cc_cross], ac_cv_build_prog_cc_cross)dnl
52pushdef([ac_cv_prog_cc_g], ac_cv_build_prog_cc_g)dnl
53pushdef([ac_cv_prog_cc_stdc], ac_cv_build_prog_cc_stdc)dnl
54pushdef([ac_cv_prog_cc_c11], ac_cv_build_prog_cc_c11)dnl
55pushdef([ac_cv_prog_cc_c99], ac_cv_build_prog_cc_c99)dnl
56pushdef([ac_cv_prog_cc_c89], ac_cv_build_prog_cc_c89)dnl
57pushdef([ac_cv_exeext], ac_cv_build_exeext)dnl
58pushdef([ac_cv_objext], ac_cv_build_objext)dnl
59pushdef([ac_exeext], ac_build_exeext)dnl
60pushdef([ac_objext], ac_build_objext)dnl
61pushdef([CC], CC_FOR_BUILD)dnl
62pushdef([CPP], CPP_FOR_BUILD)dnl
63pushdef([CFLAGS], CFLAGS_FOR_BUILD)dnl
64pushdef([CPPFLAGS], CPPFLAGS_FOR_BUILD)dnl
65pushdef([LDFLAGS], LDFLAGS_FOR_BUILD)dnl
66pushdef([WARN_CFLAGS], WARN_CFLAGS_FOR_BUILD)dnl
67pushdef([host], build)dnl
68pushdef([host_alias], build_alias)dnl
69pushdef([host_cpu], build_cpu)dnl
70pushdef([host_vendor], build_vendor)dnl
71pushdef([host_os], build_os)dnl
72pushdef([ac_cv_host], ac_cv_build)dnl
73pushdef([ac_cv_host_alias], ac_cv_build_alias)dnl
74pushdef([ac_cv_host_cpu], ac_cv_build_cpu)dnl
75pushdef([ac_cv_host_vendor], ac_cv_build_vendor)dnl
76pushdef([ac_cv_host_os], ac_cv_build_os)dnl
77pushdef([am_cv_prog_cc_c_o], am_cv_build_prog_cc_c_o)dnl
78pushdef([am_cv_CC_dependencies_compiler_type], am_cv_build_CC_dependencies_compiler_type)dnl
79pushdef([gl_unknown_warnings_are_errors], gl_build_unknown_warnings_are_errors)dnl
80
81st_SAVE_VAR([ac_c_decl_warn_flag])
82st_SAVE_VAR([ac_c_preproc_warn_flag])
83st_SAVE_VAR([ac_c_werror_flag])
84st_SAVE_VAR([ac_compile])
85st_SAVE_VAR([ac_compiler_gnu])
86st_SAVE_VAR([ac_cpp])
87st_SAVE_VAR([ac_cv_c_compiler_gnu])
88st_SAVE_VAR([ac_cv_c_decl_report])
89st_SAVE_VAR([ac_link])
90st_SAVE_VAR([ac_tool_prefix])
91st_SAVE_VAR([cross_compiling])
92cross_compiling=no
93
94AC_MSG_NOTICE([looking for a C compiler that generates native executables])
95AC_PROG_CC
96AC_PROG_CPP
97AC_EXEEXT
98
99st_WARN_CFLAGS
100
101st_RESTORE_VAR([cross_compiling])
102st_RESTORE_VAR([ac_tool_prefix])
103st_RESTORE_VAR([ac_link])
104st_RESTORE_VAR([ac_cv_c_decl_report])
105st_RESTORE_VAR([ac_cv_c_compiler_gnu])
106st_RESTORE_VAR([ac_cpp])
107st_RESTORE_VAR([ac_compiler_gnu])
108st_RESTORE_VAR([ac_compile])
109st_RESTORE_VAR([ac_c_werror_flag])
110st_RESTORE_VAR([ac_c_preproc_warn_flag])
111st_RESTORE_VAR([ac_c_decl_warn_flag])
112
113dnl Restore the old definitions
114dnl
115popdef([gl_unknown_warnings_are_errors])dnl
116popdef([am_cv_CC_dependencies_compiler_type])dnl
117popdef([am_cv_prog_cc_c_o])dnl
118popdef([ac_cv_host_os])dnl
119popdef([ac_cv_host_vendor])dnl
120popdef([ac_cv_host_cpu])dnl
121popdef([ac_cv_host_alias])dnl
122popdef([ac_cv_host])dnl
123popdef([host_os])dnl
124popdef([host_vendor])dnl
125popdef([host_cpu])dnl
126popdef([host_alias])dnl
127popdef([host])dnl
128popdef([WARN_CFLAGS])dnl
129popdef([LDFLAGS])dnl
130popdef([CPPFLAGS])dnl
131popdef([CFLAGS])dnl
132popdef([CPP])dnl
133popdef([CC])dnl
134popdef([ac_objext])dnl
135popdef([ac_exeext])dnl
136popdef([ac_cv_objext])dnl
137popdef([ac_cv_exeext])dnl
138popdef([ac_cv_prog_cc_c89])dnl
139popdef([ac_cv_prog_cc_c99])dnl
140popdef([ac_cv_prog_cc_c11])dnl
141popdef([ac_cv_prog_cc_stdc])dnl
142popdef([ac_cv_prog_cc_g])dnl
143popdef([ac_cv_prog_cc_cross])dnl
144popdef([ac_cv_prog_cc_works])dnl
145popdef([ac_cv_prog_gcc])dnl
146popdef([ac_cv_prog_CPP])dnl
147
148dnl Finally, set Makefile variables
149dnl
150BUILD_EXEEXT=$ac_build_exeext
151BUILD_OBJEXT=$ac_build_objext
152AC_SUBST(BUILD_EXEEXT)dnl
153AC_SUBST(BUILD_OBJEXT)dnl
154AC_SUBST([CFLAGS_FOR_BUILD])dnl
155AC_SUBST([CPPFLAGS_FOR_BUILD])dnl
156AC_SUBST([LDFLAGS_FOR_BUILD])dnl
157AC_SUBST([WARN_CFLAGS_FOR_BUILD])dnl
158])
159