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re PR debug/46749 (gcc.dg/debug/pr41893-1.c -gdwarf-2 testsuite failures on darwin)
[thirdparty/gcc.git] / libquadmath / configure.ac
CommitLineData
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1# Process this file with autoconf to produce a configure script, like so:
2# aclocal && autoconf && autoheader && automake
3
4AC_PREREQ(2.64)
5AC_INIT([GCC Quad-precision Math Library], 0.1,,[libquadmath])
6AC_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 $with_cross_host.
20#
21# Do not delete or change the following two lines. For why, see
22# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
23AC_CANONICAL_SYSTEM
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24ACX_NONCANONICAL_TARGET
25
1ec601bf 26target_alias=${target_alias-$host_alias}
fabfcf5e 27AC_SUBST(target_alias)
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28
29AM_INIT_AUTOMAKE([1.9.0 foreign subdir-objects no-dist -Wall -Werror])
30
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31AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
32AC_ARG_ENABLE(version-specific-runtime-libs,
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33AS_HELP_STRING([--enable-version-specific-runtime-libs],
34 [specify that runtime libraries should be installed in a compiler-specific directory]),
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35[case "$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])
41AC_MSG_RESULT($version_specific_libs)
42
fabfcf5e 43GCC_NO_EXECUTABLES
1ec601bf 44
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45# See if makeinfo has been installed and is modern enough
46# that we can use it.
47ACX_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]*])
50AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
51
52
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53# Configure libtool
54AM_PROG_LIBTOOL
7de6ba7a 55ACX_LT_HOST_FLAGS
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56AC_SUBST(enable_shared)
57AC_SUBST(enable_static)
58
59AM_MAINTAINER_MODE
60AM_ENABLE_MULTILIB(, ..)
61
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62AC_LANG_C
63# The same as in boehm-gc and libstdc++. Have to borrow it from there.
64# We must force CC to /not/ be precious variables; otherwise
65# the wrong, non-multilib-adjusted value will be used in multilibs.
66# As a side effect, we have to subst CFLAGS ourselves.
67
68m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
69m4_define([_AC_ARG_VAR_PRECIOUS],[])
70AC_PROG_CC
71m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
72
73AC_SUBST(CFLAGS)
74
75AM_PROG_CC_C_O
76
77if test "x$GCC" != "xyes"; then
78 AC_MSG_ERROR([libquadmath must be built with GCC])
79fi
80AC_PROG_CPP
81
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82# Calculate toolexeclibdir
83# Also toolexecdir, though it's only used in toolexeclibdir
84case ${version_specific_libs} in
85 yes)
86 # Need the gcc compiler version to know where to install libraries
87 # and header files if --enable-version-specific-runtime-libs option
88 # is selected.
89 toolexecdir='$(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/$multi_os_directory ;;
106 esac
107 ;;
108esac
109AC_SUBST(toolexecdir)
110AC_SUBST(toolexeclibdir)
111
112AC_CHECK_LIB([m],[sqrtl],[AC_DEFINE([HAVE_SQRTL],[1],[libm includes sqrtl])])
113AC_CHECK_LIB([m],[cbrtl],[AC_DEFINE([HAVE_CBRTL],[1],[libm includes cbrtl])])
114
115# Check for symbol versioning (copied from libssp).
116AC_MSG_CHECKING([whether symbol versioning is supported])
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117if test x$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
121else
122 save_LDFLAGS="$LDFLAGS"
123 LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map"
124 cat > conftest.map <<EOF
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125FOO_1.0 {
126 global: *foo*; bar; local: *;
127};
128EOF
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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
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137FOO_1.0 {
138 global: foo; local: *;
139};
140EOF
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141 AC_TRY_LINK([int foo;],[],[quadmath_use_symver=sun],[quadmath_use_symver=no])
142 ;;
143 esac
144 fi
145 LDFLAGS="$save_LDFLAGS"
1ec601bf 146fi
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147AC_MSG_RESULT($quadmath_use_symver)
148AM_CONDITIONAL(LIBQUAD_USE_SYMVER, [test "x$quadmath_use_symver" != xno])
149AM_CONDITIONAL(LIBQUAD_USE_SYMVER_GNU, [test "x$quadmath_use_symver" = xgnu])
150AM_CONDITIONAL(LIBQUAD_USE_SYMVER_SUN, [test "x$quadmath_use_symver" = xsun])
151
152AC_MSG_CHECKING([whether __float128 is supported])
153 AC_TRY_LINK([
154 typedef _Complex float __attribute__((mode(TC))) __complex128;
155
156 __float128 foo (__float128 x)
157 {
158
159 __complex128 z1, z2;
160
161 z1 = x;
162 z2 = x / 7.Q;
163 z2 /= z1;
164
165 return (__float128) z2;
166 }
167
168 __float128 bar (__float128 x)
169 {
170 return x * __builtin_huge_valq ();
171 }
172 ],[
173 foo (1.2Q);
174 bar (1.2Q);
175 ],[
176 libquad_have_float128=yes
177 ],[
178 libquad_have_float128=no
179])
180AC_MSG_RESULT([$libquad_have_float128])
181
182dnl
183dnl Enable the following for a stand-alone library:
184dnl
185dnl if test $libquad_have_float128 = no; then
186dnl AC_MSG_ERROR([__float128 support is required to build this library.])
187dnl fi
188
189AM_CONDITIONAL(BUILD_LIBQUADMATH, [test "x$libquad_have_float128" = xyes])
190
191AC_CACHE_SAVE
192
193if test ${multilib} = yes; then
194 multilib_arg="--enable-multilib"
195else
196 multilib_arg=
197fi
198
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199
200# We would like our source tree to be readonly. However when releases or
201# pre-releases are generated, the flex/bison generated files as well as the
202# various formats of manuals need to be included along with the rest of the
203# sources. Therefore we have --enable-generated-files-in-srcdir to do
204# just that.
205AC_MSG_CHECKING(generated-files-in-srcdir)
206AC_ARG_ENABLE(generated-files-in-srcdir,
207AS_HELP_STRING([--enable-generated-files-in-srcdir],
208 [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex]),
209[case "$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])
215AC_MSG_RESULT($enable_generated_files_in_srcdir)
216AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
217
218
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219AC_CONFIG_FILES(Makefile)
220AC_OUTPUT