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77008252 | 1 | # Process this file with autoconf to produce a configure script, like so: |
f2b5129c MM |
2 | # |
3 | # aclocal -I .. -I ../config && autoconf && autoheader && automake | |
77008252 | 4 | |
77008252 JJ |
5 | AC_INIT(libssp, 1.0) |
6 | AC_CONFIG_SRCDIR(ssp.c) | |
7 | AC_CANONICAL_SYSTEM | |
f2b5129c | 8 | ACX_NONCANONICAL_TARGET |
77008252 | 9 | |
13917ae3 | 10 | AM_INIT_AUTOMAKE([no-dist]) |
77008252 JJ |
11 | |
12 | AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) | |
13 | AC_ARG_ENABLE(version-specific-runtime-libs, | |
14 | [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ], | |
15 | [case "$enableval" in | |
16 | yes) version_specific_libs=yes ;; | |
17 | no) version_specific_libs=no ;; | |
18 | *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; | |
19 | esac], | |
20 | [version_specific_libs=no]) | |
21 | AC_MSG_RESULT($version_specific_libs) | |
22 | ||
23 | AM_MAINTAINER_MODE | |
be14fe72 JM |
24 | |
25 | GCC_NO_EXECUTABLES | |
77008252 JJ |
26 | |
27 | AM_ENABLE_MULTILIB(, ..) | |
28 | ||
29 | target_alias=${target_alias-$host_alias} | |
30 | AC_SUBST(target_alias) | |
31 | ||
32 | AC_CONFIG_HEADERS(config.h) | |
33 | ||
34 | AC_LANG_C | |
35 | # The same as in boehm-gc and libstdc++. Have to borrow it from there. | |
36 | # We must force CC to /not/ be precious variables; otherwise | |
37 | # the wrong, non-multilib-adjusted value will be used in multilibs. | |
38 | # As a side effect, we have to subst CFLAGS ourselves. | |
39 | ||
40 | m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) | |
41 | m4_define([_AC_ARG_VAR_PRECIOUS],[]) | |
42 | AC_PROG_CC | |
1b3b24c2 | 43 | m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) |
77008252 JJ |
44 | |
45 | AC_SUBST(CFLAGS) | |
46 | ||
47 | if test "x$GCC" != "xyes"; then | |
48 | AC_MSG_ERROR([libssp must be built with GCC]) | |
49 | fi | |
50 | AC_PROG_CPP | |
51 | ||
52 | AC_MSG_CHECKING([whether -fstack-protector works]) | |
53 | save_CFLAGS="$CFLAGS" | |
54 | CFLAGS="$CFLAGS -fstack-protector -Werror" | |
55 | AC_TRY_COMPILE([ | |
56 | void __attribute__((noinline)) bar (char *x) | |
57 | { | |
58 | __builtin_memset (x, 0, 64); | |
59 | }],[char buf[64]; bar (buf);], | |
60 | [AC_MSG_RESULT(yes)], | |
61 | [AC_MSG_RESULT(no)]) | |
62 | CFLAGS="$save_CFLAGS" | |
63 | ||
ff035ef6 IT |
64 | # Add CET specific flags if CET is enabled |
65 | GCC_CET_FLAGS(CET_FLAGS) | |
66 | XCFLAGS="$XCFLAGS $CET_FLAGS" | |
67 | AC_SUBST(XCFLAGS) | |
68 | ||
77008252 JJ |
69 | AC_MSG_CHECKING([whether hidden visibility is supported]) |
70 | AC_TRY_COMPILE([ | |
71 | void __attribute__((visibility ("hidden"))) bar (void) {}],, | |
72 | [ssp_hidden=yes],[ssp_hidden=no]) | |
73 | AC_MSG_RESULT($ssp_hidden) | |
74 | if test x$ssp_hidden = xyes; then | |
75 | AC_DEFINE([HAVE_HIDDEN_VISIBILITY],[1],[__attribute__((visibility ("hidden"))) supported]) | |
76 | fi | |
77 | ||
78 | AC_MSG_CHECKING([whether symbol versioning is supported]) | |
bf382f5f RO |
79 | AC_ARG_ENABLE(symvers, |
80 | AS_HELP_STRING([--disable-symvers], | |
81 | [disable symbol versioning for libssp]), | |
82 | ssp_use_symver=$enableval, | |
83 | ssp_use_symver=yes) | |
19af62db | 84 | if test "x$ssp_use_symver" != xno; then |
bf382f5f RO |
85 | if test x$gcc_no_link = xyes; then |
86 | # If we cannot link, we cannot build shared libraries, so do not use | |
87 | # symbol versioning. | |
88 | ssp_use_symver=no | |
89 | else | |
90 | save_LDFLAGS="$LDFLAGS" | |
91 | LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map" | |
92 | cat > conftest.map <<EOF | |
ca6d1176 RO |
93 | FOO_1.0 { |
94 | global: *foo*; bar; local: *; | |
95 | }; | |
96 | EOF | |
bf382f5f RO |
97 | AC_TRY_LINK([int foo;],[],[ssp_use_symver=gnu],[ssp_use_symver=no]) |
98 | if test x$ssp_use_symver = xno; then | |
99 | case "$target_os" in | |
100 | solaris2*) | |
101 | LDFLAGS="$save_LDFLAGS" | |
102 | LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map" | |
103 | # Sun ld cannot handle wildcards and treats all entries as undefined. | |
104 | cat > conftest.map <<EOF | |
ca6d1176 RO |
105 | FOO_1.0 { |
106 | global: foo; local: *; | |
107 | }; | |
108 | EOF | |
bf382f5f RO |
109 | AC_TRY_LINK([int foo;],[],[ssp_use_symver=sun],[ssp_use_symver=no]) |
110 | ;; | |
111 | esac | |
112 | fi | |
113 | LDFLAGS="$save_LDFLAGS" | |
ca6d1176 | 114 | fi |
be14fe72 | 115 | fi |
77008252 | 116 | AC_MSG_RESULT($ssp_use_symver) |
ca6d1176 RO |
117 | AM_CONDITIONAL(LIBSSP_USE_SYMVER, [test "x$ssp_use_symver" != xno]) |
118 | AM_CONDITIONAL(LIBSSP_USE_SYMVER_GNU, [test "x$ssp_use_symver" = xgnu]) | |
119 | AM_CONDITIONAL(LIBSSP_USE_SYMVER_SUN, [test "x$ssp_use_symver" = xsun]) | |
77008252 | 120 | |
266aa805 | 121 | AC_CHECK_HEADERS(alloca.h malloc.h paths.h syslog.h string.h unistd.h fcntl.h stdio.h limits.h) |
77008252 | 122 | |
be14fe72 JM |
123 | if test x$gcc_no_link = xyes; then |
124 | # Presume the ISO C functions are available; add target-specific | |
125 | # configuration here if required. | |
126 | AC_DEFINE(HAVE_STRNCPY) | |
127 | AC_DEFINE(HAVE_STRNCAT) | |
128 | else | |
ca6d1176 | 129 | AC_CHECK_FUNCS(memmove mempcpy strncpy strncat) |
be14fe72 | 130 | fi |
77008252 JJ |
131 | |
132 | AC_MSG_CHECKING([whether vsnprintf is usable]) | |
22e05272 | 133 | AC_RUN_IFELSE([AC_LANG_PROGRAM([ |
77008252 JJ |
134 | #include <stdarg.h> |
135 | #include <string.h> | |
136 | #include <stdio.h> | |
137 | int foo (char *buf, size_t n, const char *fmt, ...) | |
138 | { | |
139 | va_list ap; | |
140 | int ret; | |
141 | va_start (ap, fmt); | |
142 | ret = vsnprintf (buf, n, fmt, ap); | |
143 | va_end (ap); | |
144 | return ret; | |
145 | }], | |
146 | [char buf@<:@8@:>@; memset (buf, 'A', sizeof (buf)); | |
147 | if (foo (buf, 4, ".%s.", "CDEFG") != 7) | |
148 | return 1; | |
22e05272 | 149 | return memcmp (buf, ".CD\0AAAA", sizeof (buf)) != 0;])], |
77008252 JJ |
150 | [ssp_have_usable_vsnprintf=define], |
151 | [ssp_have_usable_vsnprintf=undef], | |
152 | [ssp_have_usable_vsnprintf=undef]) | |
153 | if test "x$ssp_have_usable_vsnprintf" = xdefine; then | |
154 | AC_MSG_RESULT(yes) | |
155 | AC_DEFINE([HAVE_USABLE_VSNPRINTF],[1],[vsnprintf is present and works]) | |
156 | else | |
157 | AC_MSG_RESULT(no) | |
158 | fi | |
159 | AC_SUBST(ssp_have_usable_vsnprintf) | |
160 | ||
161 | AM_PROG_LIBTOOL | |
7de6ba7a | 162 | ACX_LT_HOST_FLAGS |
77008252 JJ |
163 | AC_SUBST(enable_shared) |
164 | AC_SUBST(enable_static) | |
165 | ||
166 | # Calculate toolexeclibdir | |
167 | # Also toolexecdir, though it's only used in toolexeclibdir | |
168 | case ${version_specific_libs} in | |
169 | yes) | |
170 | # Need the gcc compiler version to know where to install libraries | |
171 | # and header files if --enable-version-specific-runtime-libs option | |
172 | # is selected. | |
173 | toolexecdir='$(libdir)/gcc/$(target_alias)' | |
174 | toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' | |
175 | ;; | |
176 | no) | |
177 | if test -n "$with_cross_host" && | |
178 | test x"$with_cross_host" != x"no"; then | |
179 | # Install a library built with a cross compiler in tooldir, not libdir. | |
180 | toolexecdir='$(exec_prefix)/$(target_alias)' | |
181 | toolexeclibdir='$(toolexecdir)/lib' | |
182 | else | |
183 | toolexecdir='$(libdir)/gcc-lib/$(target_alias)' | |
184 | toolexeclibdir='$(libdir)' | |
185 | fi | |
186 | multi_os_directory=`$CC -print-multi-os-directory` | |
187 | case $multi_os_directory in | |
188 | .) ;; # Avoid trailing /. | |
189 | *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; | |
190 | esac | |
191 | ;; | |
192 | esac | |
193 | AC_SUBST(toolexecdir) | |
194 | AC_SUBST(toolexeclibdir) | |
195 | ||
196 | if test ${multilib} = yes; then | |
197 | multilib_arg="--enable-multilib" | |
198 | else | |
199 | multilib_arg= | |
200 | fi | |
201 | ||
3c36aa6b JJ |
202 | # Determine what GCC version number to use in filesystem paths. |
203 | GCC_BASE_VER | |
204 | ||
77008252 JJ |
205 | AC_CONFIG_FILES([Makefile ssp/ssp.h]) |
206 | AC_OUTPUT |