# Process this file with autoconf to produce a configure script, like so: # aclocal && autoconf && autoheader && automake AC_PREREQ(2.64) AC_INIT([GNU Fortran Runtime Library], 0.3,,[libgfortran]) AC_CONFIG_HEADER(config.h) GCC_TOPLEV_SUBDIRS # ------- # Options # ------- AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) AC_ARG_ENABLE(version-specific-runtime-libs, AS_HELP_STRING([--enable-version-specific-runtime-libs], [specify that runtime libraries should be installed in a compiler-specific directory]), [case "$enableval" in yes) version_specific_libs=yes ;; no) version_specific_libs=no ;; *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);; esac], [version_specific_libs=no]) AC_MSG_RESULT($version_specific_libs) # Build with intermodule optimisations AC_MSG_CHECKING([for --enable-intermodule]) AC_ARG_ENABLE(intermodule, AS_HELP_STRING([--enable-intermodule],[build the library in one step]), [case "$enable_intermodule" in yes) onestep="-onestep";; *) onestep="";; esac], [onestep=""]) AC_MSG_RESULT($enable_intermodule) AM_CONDITIONAL(onestep,[test x$onestep = x-onestep]) AC_SUBST(onestep) # Gets build, host, target, *_vendor, *_cpu, *_os, etc. # # You will slowly go insane if you do not grok the following fact: when # building this library, the top-level /target/ becomes the library's /host/. # # configure then causes --target to default to --host, exactly like any # other package using autoconf. Therefore, 'target' and 'host' will # always be the same. This makes sense both for native and cross compilers # just think about it for a little while. :-) # # Also, if this library is being configured as part of a cross compiler, the # top-level configure script will pass the "real" host as $with_cross_host. # # Do not delete or change the following two lines. For why, see # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html AC_CANONICAL_SYSTEM ACX_NONCANONICAL_TARGET target_alias=${target_alias-$host_alias} AC_SUBST(target_alias) # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. # 1.9.6: minimum required version # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch # of other PACKAGE_* variables will, however, and there's nothing # we can do about that; they come from AC_INIT). # foreign: we don't follow the normal rules for GNU packages (no COPYING # file in the top srcdir, etc, etc), so stop complaining. # no-dist: we don't want 'dist' and related rules. # -Wall: turns on all automake warnings... # -Wno-portability: ...except this one, since GNU make is required. AM_INIT_AUTOMAKE([1.9.6 no-define foreign no-dist -Wall -Wno-portability]) AM_MAINTAINER_MODE AM_ENABLE_MULTILIB(, ..) # Handy for debugging: #AC_MSG_NOTICE($build / $host / $target / $host_alias / $target_alias); sleep 5 # Are we being configured with some form of cross compiler? # NB: We don't actually need to know this just now, but when, say, a test # suite is included, we'll have to know. if test "$build" != "$host"; then LIBGFOR_IS_NATIVE=false GCC_NO_EXECUTABLES else LIBGFOR_IS_NATIVE=true fi AC_USE_SYSTEM_EXTENSIONS # Calculate toolexeclibdir # Also toolexecdir, though it's only used in toolexeclibdir case ${version_specific_libs} in yes) # Need the gcc compiler version to know where to install libraries # and header files if --enable-version-specific-runtime-libs option # is selected. toolexecdir='$(libdir)/gcc/$(target_alias)' toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' ;; no) if test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then # Install a library built with a cross compiler in tooldir, not libdir. toolexecdir='$(exec_prefix)/$(target_alias)' toolexeclibdir='$(toolexecdir)/lib' else toolexecdir='$(libdir)/gcc-lib/$(target_alias)' toolexeclibdir='$(libdir)' fi multi_os_directory=`$CC -print-multi-os-directory` case $multi_os_directory in .) ;; # Avoid trailing /. *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; esac ;; esac AC_SUBST(toolexecdir) AC_SUBST(toolexeclibdir) # Create a spec file, so that compile/link tests don't fail test -f libgfortran.spec || touch libgfortran.spec AC_LANG_C # Check the compiler. # The same as in boehm-gc and libstdc++. Have to borrow it from there. # We must force CC to /not/ be precious variables; otherwise # the wrong, non-multilib-adjusted value will be used in multilibs. # As a side effect, we have to subst CFLAGS ourselves. m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) m4_define([_AC_ARG_VAR_PRECIOUS],[]) AC_PROG_CC m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) AC_SUBST(CFLAGS) AM_PROG_CC_C_O # Add -Wall -fno-repack-arrays -fno-underscoring if we are using GCC. if test "x$GCC" = "xyes"; then AM_FCFLAGS="-I . -Wall -Werror -fimplicit-none -fno-repack-arrays -fno-underscoring" ## We like to use C99 routines when available. This makes sure that ## __STDC_VERSION__ is set such that libc includes make them available. AM_CFLAGS="-std=gnu99 -Wall -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wextra -Wwrite-strings" ## Compile the following tests with the same system header contents ## that we'll encounter when compiling our own source files. CFLAGS="-std=gnu99 $CFLAGS" fi AC_SUBST(AM_FCFLAGS) AC_SUBST(AM_CFLAGS) AC_SUBST(CFLAGS) # Check for symbol versioning (copied from libssp). AC_MSG_CHECKING([whether symbol versioning is supported]) AC_ARG_ENABLE(symvers, AS_HELP_STRING([--disable-symvers], [disable symbol versioning for libgfortran]), gfortran_use_symver=$enableval, gfortran_use_symver=yes) if test "x$gfortran_use_symver" != xno; then save_LDFLAGS="$LDFLAGS" LDFLAGS="$LDFLAGS -fPIC -shared -Wl,--version-script,./conftest.map" cat > conftest.map < conftest.map < #include #include ], [ getpwuid_r(0, NULL, NULL, 0, NULL); ])], [libgfor_cv_posix_getpwuid_r="yes"], [libgfor_cv_posix_getpwuid_r="no"])]) fi if test "$libgfor_cv_posix_getpwuid_r" = "yes"; then AC_DEFINE([HAVE_POSIX_GETPWUID_R], [1], [Define to 1 if we have POSIX getpwuid_r which takes 5 arguments.]) fi # Check out attribute support. LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT LIBGFOR_CHECK_ATTRIBUTE_ALIAS # Check out sync builtins support. LIBGFOR_CHECK_SYNC_FETCH_AND_ADD # Check out #pragma weak. LIBGFOR_GTHREAD_WEAK # Various other checks on target LIBGFOR_CHECK_UNLINK_OPEN_FILE # Check whether line terminator is LF or CRLF LIBGFOR_CHECK_CRLF # Check whether we have _Unwind_GetIPInfo for backtrace GCC_CHECK_UNWIND_GETIPINFO AC_CACHE_SAVE if test ${multilib} = yes; then multilib_arg="--enable-multilib" else multilib_arg= fi # Write our Makefile and spec file. AC_CONFIG_FILES([ Makefile libgfortran.spec ]) AC_OUTPUT