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1ec601bf FXC |
1 | # Process this file with autoconf to produce a configure script, like so: |
2 | # aclocal && autoconf && autoheader && automake | |
3 | ||
4 | AC_PREREQ(2.64) | |
5 | AC_INIT([GCC Quad-precision Math Library], 0.1,,[libquadmath]) | |
6 | AC_CONFIG_HEADER(config.h) | |
7 | ||
8 | # Gets build, host, target, *_vendor, *_cpu, *_os, etc. | |
9 | # | |
10 | # You will slowly go insane if you do not grok the following fact: when | |
11 | # building this library, the top-level /target/ becomes the library's /host/. | |
12 | # | |
13 | # configure then causes --target to default to --host, exactly like any | |
14 | # other package using autoconf. Therefore, 'target' and 'host' will | |
15 | # always be the same. This makes sense both for native and cross compilers | |
16 | # just think about it for a little while. :-) | |
17 | # | |
18 | # Also, if this library is being configured as part of a cross compiler, the | |
19 | # top-level configure script will pass the "real" host as $with_cross_host. | |
20 | # | |
21 | # Do not delete or change the following two lines. For why, see | |
22 | # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html | |
23 | AC_CANONICAL_SYSTEM | |
fabfcf5e KT |
24 | ACX_NONCANONICAL_TARGET |
25 | ||
1ec601bf | 26 | target_alias=${target_alias-$host_alias} |
fabfcf5e | 27 | AC_SUBST(target_alias) |
1ec601bf FXC |
28 | |
29 | AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Werror]) | |
30 | ||
1ec601bf FXC |
31 | AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) |
32 | AC_ARG_ENABLE(version-specific-runtime-libs, | |
4c993c44 TB |
33 | AS_HELP_STRING([--enable-version-specific-runtime-libs], |
34 | [specify that runtime libraries should be installed in a compiler-specific directory]), | |
1ec601bf FXC |
35 | [case "$enableval" in |
36 | yes) version_specific_libs=yes ;; | |
37 | no) version_specific_libs=no ;; | |
38 | *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; | |
39 | esac], | |
40 | [version_specific_libs=no]) | |
41 | AC_MSG_RESULT($version_specific_libs) | |
42 | ||
fabfcf5e | 43 | GCC_NO_EXECUTABLES |
1ec601bf | 44 | |
4c993c44 TB |
45 | # See if makeinfo has been installed and is modern enough |
46 | # that we can use it. | |
47 | ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version], | |
48 | [GNU texinfo.* \([0-9][0-9.]*\)], | |
49 | [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*]) | |
50 | AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") | |
51 | ||
52 | ||
1ec601bf FXC |
53 | # Configure libtool |
54 | AM_PROG_LIBTOOL | |
7de6ba7a | 55 | ACX_LT_HOST_FLAGS |
1ec601bf FXC |
56 | AC_SUBST(enable_shared) |
57 | AC_SUBST(enable_static) | |
58 | ||
59 | AM_MAINTAINER_MODE | |
60 | AM_ENABLE_MULTILIB(, ..) | |
61 | ||
fabfcf5e KT |
62 | AC_LANG_C |
63 | # The same as in boehm-gc and libstdc++. Have to borrow it from there. | |
64 | # We must force CC to /not/ be precious variables; otherwise | |
65 | # the wrong, non-multilib-adjusted value will be used in multilibs. | |
66 | # As a side effect, we have to subst CFLAGS ourselves. | |
67 | ||
68 | m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) | |
69 | m4_define([_AC_ARG_VAR_PRECIOUS],[]) | |
70 | AC_PROG_CC | |
71 | m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) | |
72 | ||
73 | AC_SUBST(CFLAGS) | |
74 | ||
75 | AM_PROG_CC_C_O | |
76 | ||
77 | if test "x$GCC" != "xyes"; then | |
78 | AC_MSG_ERROR([libquadmath must be built with GCC]) | |
79 | fi | |
80 | AC_PROG_CPP | |
81 | ||
1ec601bf FXC |
82 | # Calculate toolexeclibdir |
83 | # Also toolexecdir, though it's only used in toolexeclibdir | |
84 | case ${version_specific_libs} in | |
85 | yes) | |
86 | # Need the gcc compiler version to know where to install libraries | |
87 | # and header files if --enable-version-specific-runtime-libs option | |
88 | # is selected. | |
89 | toolexecdir='$(libdir)/gcc/$(target_alias)' | |
90 | toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' | |
91 | ;; | |
92 | no) | |
93 | if test -n "$with_cross_host" && | |
94 | test x"$with_cross_host" != x"no"; then | |
95 | # Install a library built with a cross compiler in tooldir, not libdir. | |
96 | toolexecdir='$(exec_prefix)/$(target_alias)' | |
97 | toolexeclibdir='$(toolexecdir)/lib' | |
98 | else | |
99 | toolexecdir='$(libdir)/gcc-lib/$(target_alias)' | |
100 | toolexeclibdir='$(libdir)' | |
101 | fi | |
102 | multi_os_directory=`$CC -print-multi-os-directory` | |
103 | case $multi_os_directory in | |
104 | .) ;; # Avoid trailing /. | |
105 | *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; | |
106 | esac | |
107 | ;; | |
108 | esac | |
109 | AC_SUBST(toolexecdir) | |
110 | AC_SUBST(toolexeclibdir) | |
111 | ||
112 | AC_CHECK_LIB([m],[sqrtl],[AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])]) | |
113 | AC_CHECK_LIB([m],[cbrtl],[AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])]) | |
114 | ||
115 | # Check for symbol versioning (copied from libssp). | |
116 | AC_MSG_CHECKING([whether symbol versioning is supported]) | |
fabfcf5e KT |
117 | if test x$gcc_no_link = xyes; then |
118 | # If we cannot link, we cannot build shared libraries, so do not use | |
119 | # symbol versioning. | |
120 | quadmath_use_symver=no | |
121 | else | |
122 | save_LDFLAGS="$LDFLAGS" | |
123 | LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map" | |
124 | cat > conftest.map <<EOF | |
1ec601bf FXC |
125 | FOO_1.0 { |
126 | global: *foo*; bar; local: *; | |
127 | }; | |
128 | EOF | |
fabfcf5e KT |
129 | AC_TRY_LINK([int foo;],[],[quadmath_use_symver=gnu],[quadmath_use_symver=no]) |
130 | if test x$quadmath_use_symver = xno; then | |
131 | case "$target_os" in | |
132 | solaris2*) | |
133 | LDFLAGS="$save_LDFLAGS" | |
134 | LDFLAGS="$LDFLAGS -fPIC -shared -Wl,-M,./conftest.map" | |
135 | # Sun ld cannot handle wildcards and treats all entries as undefined. | |
136 | cat > conftest.map <<EOF | |
1ec601bf FXC |
137 | FOO_1.0 { |
138 | global: foo; local: *; | |
139 | }; | |
140 | EOF | |
fabfcf5e KT |
141 | AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no]) |
142 | ;; | |
143 | esac | |
144 | fi | |
145 | LDFLAGS="$save_LDFLAGS" | |
1ec601bf | 146 | fi |
1ec601bf FXC |
147 | AC_MSG_RESULT($quadmath_use_symver) |
148 | AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno]) | |
149 | AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu]) | |
150 | AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun]) | |
151 | ||
152 | AC_MSG_CHECKING([whether __float128 is supported]) | |
153 | AC_TRY_LINK([ | |
154 | typedef _Complex float __attribute__((mode(TC))) __complex128; | |
155 | ||
156 | __float128 foo (__float128 x) | |
157 | { | |
158 | ||
159 | __complex128 z1, z2; | |
160 | ||
161 | z1 = x; | |
162 | z2 = x / 7.Q; | |
163 | z2 /= z1; | |
164 | ||
165 | return (__float128) z2; | |
166 | } | |
167 | ||
168 | __float128 bar (__float128 x) | |
169 | { | |
170 | return x * __builtin_huge_valq (); | |
171 | } | |
172 | ],[ | |
173 | foo (1.2Q); | |
174 | bar (1.2Q); | |
175 | ],[ | |
176 | libquad_have_float128=yes | |
177 | ],[ | |
178 | libquad_have_float128=no | |
179 | ]) | |
180 | AC_MSG_RESULT([$libquad_have_float128]) | |
181 | ||
182 | dnl | |
183 | dnl Enable the following for a stand-alone library: | |
184 | dnl | |
185 | dnl if test $libquad_have_float128 = no; then | |
186 | dnl AC_MSG_ERROR([__float128 support is required to build this library.]) | |
187 | dnl fi | |
188 | ||
189 | AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_have_float128" = xyes]) | |
190 | ||
191 | AC_CACHE_SAVE | |
192 | ||
193 | if test ${multilib} = yes; then | |
194 | multilib_arg="--enable-multilib" | |
195 | else | |
196 | multilib_arg= | |
197 | fi | |
198 | ||
4c993c44 TB |
199 | |
200 | # We would like our source tree to be readonly. However when releases or | |
201 | # pre-releases are generated, the flex/bison generated files as well as the | |
202 | # various formats of manuals need to be included along with the rest of the | |
203 | # sources. Therefore we have --enable-generated-files-in-srcdir to do | |
204 | # just that. | |
205 | AC_MSG_CHECKING(generated-files-in-srcdir) | |
206 | AC_ARG_ENABLE(generated-files-in-srcdir, | |
207 | AS_HELP_STRING([--enable-generated-files-in-srcdir], | |
208 | [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]), | |
209 | [case "$enableval" in | |
210 | yes) enable_generated_files_in_srcdir=yes ;; | |
211 | no) enable_generated_files_in_srcdir=no ;; | |
212 | *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; | |
213 | esac], | |
214 | [enable_generated_files_in_srcdir=no]) | |
215 | AC_MSG_RESULT($enable_generated_files_in_srcdir) | |
216 | AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) | |
217 | ||
218 | ||
1ec601bf FXC |
219 | AC_CONFIG_FILES(Makefile) |
220 | AC_OUTPUT |