Newer
Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
# Code imported from Newlib
#
# FIXME: We temporarily define our own version of AC_PROG_CC. This is
# copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS. We
# are probably using a cross compiler, which will not be able to fully
# link an executable. This should really be fixed in autoconf
# itself.
AC_DEFUN([LIB_AC_PROG_CC_GNU],
[AC_CACHE_CHECK(whether we are using GNU C, ac_cv_prog_gcc,
[dnl The semicolon is to pacify NeXT's syntax-checking cpp.
cat > conftest.c <<EOF
#ifdef __GNUC__
yes;
#endif
EOF
if AC_TRY_COMMAND(${CC-cc} -E conftest.c) | egrep yes >/dev/null 2>&1; then
ac_cv_prog_gcc=yes
else
ac_cv_prog_gcc=no
fi])])
AC_DEFUN([LIB_AM_PROG_AS],
[# By default we simply use the C compiler to build assembly code.
AC_REQUIRE([LIB_AC_PROG_CC])
test "${CCAS+set}" = set || CCAS=$CC
test "${CCASFLAGS+set}" = set || CCASFLAGS=$CFLAGS
AC_ARG_VAR([CCAS], [assembler compiler command (defaults to CC)])
AC_ARG_VAR([CCASFLAGS], [assembler compiler flags (defaults to CFLAGS)])
])
AC_DEFUN([LIB_AC_PROG_CC],
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_CHECK_PROG(CC, gcc, gcc)
_AM_DEPENDENCIES(CC)
if test -z "$CC"; then
AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
fi
LIB_AC_PROG_CC_GNU
if test $ac_cv_prog_gcc = yes; then
GCC=yes
dnl Check whether -g works, even if CFLAGS is set, in case the package
dnl plays around with CFLAGS (such as to build both debugging and
dnl normal versions of a library), tasteless as that idea is.
ac_test_CFLAGS="${CFLAGS+set}"
ac_save_CFLAGS="$CFLAGS"
CFLAGS=
_AC_PROG_CC_G
if test "$ac_test_CFLAGS" = set; then
CFLAGS="$ac_save_CFLAGS"
elif test $ac_cv_prog_cc_g = yes; then
CFLAGS="-g -O2"
else
CFLAGS="-O2"
fi
else
GCC=
test "${CFLAGS+set}" = set || CFLAGS="-g"
fi
])
m4_rename([AC_PROG_CXX],[old_AC_PROG_CXX])
AN_MAKEVAR([CXX], [AC_PROG_CXX])
AN_PROGRAM([CC], [AC_PROG_CXX])
AN_PROGRAM([c++], [AC_PROG_CXX])
AN_PROGRAM([g++], [AC_PROG_CXX])
AC_DEFUN([AC_PROG_CXX],
[AC_LANG_PUSH(C++)dnl
AC_ARG_VAR([CXX], [C++ compiler command])dnl
AC_ARG_VAR([CXXFLAGS], [C++ compiler flags])dnl
_AC_ARG_VAR_LDFLAGS()dnl
_AC_ARG_VAR_LIBS()dnl
_AC_ARG_VAR_CPPFLAGS()dnl
_AC_ARG_VAR_PRECIOUS([CCC])dnl
if test -z "$CXX"; then
if test -n "$CCC"; then
CXX=$CCC
else
AC_CHECK_TOOLS(CXX,
[m4_default([$1],
[g++ c++ gpp aCC CC cxx cc++ cl.exe FCC KCC RCC xlC_r xlC])],
g++)
fi
fi
# Provide some information about the compiler.
_AS_ECHO_LOG([checking for _AC_LANG compiler version])
set X $ac_compile
ac_compiler=$[2]
for ac_option in --version -v -V -qversion; do
_AC_DO_LIMIT([$ac_compiler $ac_option >&AS_MESSAGE_LOG_FD])
done
#m4_expand_once([_AC_COMPILER_EXEEXT])[]dnl
m4_expand_once([_AC_COMPILER_OBJEXT])[]dnl
#_AC_LANG_COMPILER_GNU
#if test $ac_compiler_gnu = yes; then
# GXX=yes
#else
# GXX=
#fi
#_AC_PROG_CXX_G
AC_LANG_POP(C++)dnl
])# AC_PROG_CXX