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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
AC_INIT([LTO plugin for ld], 0.1,,[lto-plugin])
AC_CANONICAL_SYSTEM
GCC_TOPLEV_SUBDIRS
AM_INIT_AUTOMAKE([foreign no-dist])
AM_MAINTAINER_MODE
AC_ARG_WITH(libiberty,
[AS_HELP_STRING([--with-libiberty=PATH],
[specify the directory where to find libiberty [../libiberty]])],
[], with_libiberty=../libiberty)
AC_SUBST(with_libiberty)
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_CC
AC_SYS_LARGEFILE
ACX_PROG_CC_WARNING_OPTS([-Wall], [ac_lto_plugin_warn_cflags])
# Check whether -static-libgcc is supported.
saved_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -static-libgcc"
AC_MSG_CHECKING([for -static-libgcc])
AC_LINK_IFELSE([AC_LANG_SOURCE([
int main() {}])], [have_static_libgcc=yes], [have_static_libgcc=no])
AC_MSG_RESULT($have_static_libgcc);
LDFLAGS="$saved_LDFLAGS"
# Need -Wc to get it through libtool.
if test "x$have_static_libgcc" = xyes; then
ac_lto_plugin_ldflags="-Wc,-static-libgcc"
fi
AC_SUBST(ac_lto_plugin_ldflags)
GCC_CET_HOST_FLAGS(CET_HOST_FLAGS)
AC_SUBST(CET_HOST_FLAGS)
if test x"$host_subdir" = x.; then
gcc_build_dir=../gcc
else
gcc_build_dir=../../$host_subdir/gcc
fi
AC_SUBST(gcc_build_dir)
# Used for constructing correct paths for offload compilers.
accel_dir_suffix=
real_target_noncanonical=${target_noncanonical}
if test x"$enable_as_accelerator_for" != x; then
accel_dir_suffix=/accel/${target_noncanonical}
real_target_noncanonical=${enable_as_accelerator_for}
fi
AC_SUBST(accel_dir_suffix)
AC_SUBST(real_target_noncanonical)
# Determine what GCC version number to use in filesystem paths.
GCC_BASE_VER
AC_MSG_CHECKING([whether symbol versioning is supported])
lto_plugin_use_symver=no
if test x$gcc_no_link = xyes; then
# If we cannot link, we cannot build shared libraries, so do not use
# symbol versioning.
lto_plugin_use_symver=no
else
save_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
cat > conftest.map <<EOF
{
global: *foo*; bar; local: *;
};
EOF
AC_TRY_LINK([int foo;],[],[lto_plugin_use_symver=gnu],[lto_plugin_use_symver=no])
if test x$lto_plugin_use_symver = xno; then
case "$target_os" in
solaris2*)
LDFLAGS="$save_LDFLAGS"
LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map"
# Sun ld cannot handle wildcards and treats all entries as undefined.
cat > conftest.map <<EOF
{
global: foo; local: *;
};
EOF
AC_TRY_LINK([int foo;],[],[lto_plugin_use_symver=sun],[lto_plugin_use_symver=no])
;;
esac
fi
LDFLAGS="$save_LDFLAGS"
fi
AC_MSG_RESULT($lto_plugin_use_symver)
AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER, [test "x$lto_plugin_use_symver" != xno])
AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER_GNU, [test "x$lto_plugin_use_symver" = xgnu])
AM_CONDITIONAL(LTO_PLUGIN_USE_SYMVER_SUN, [test "x$lto_plugin_use_symver" = xsun])
# Check for thread headers.
use_locking=no
ac_lto_plugin_extra_ldflags=
case $host in
riscv*)
# do not use locking as pthread depends on libatomic
;;
*-linux*)
use_locking=yes
;;
esac
if test x$use_locking = xyes; then
AC_CHECK_HEADER(pthread.h,
[AC_DEFINE(HAVE_PTHREAD_LOCKING, 1, [Define if the system provides pthread locking mechanism.])])
ac_lto_plugin_extra_ldflags="-pthread"
fi
AC_SUBST(ac_lto_plugin_extra_ldflags)
AM_PROG_LIBTOOL
ACX_LT_HOST_FLAGS
AC_SUBST(target_noncanonical)
AC_TYPE_INT64_T
AC_TYPE_UINT64_T
AC_HEADER_SYS_WAIT
AC_CONFIG_FILES(Makefile)
AC_CONFIG_HEADERS(config.h)
AC_OUTPUT
|
