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There is a configure option --without-fp that specifies that nofpu sysdeps directories should be used instead of fpu directories. For most glibc configurations, this option is of no use: either there is no valid nofpu variant of that configuration, or there are no fpu or nofpu sysdeps directories for that processor and so the option does nothing. For a few configurations, if you are using a soft-float compiler this option is required, and failing to use it generally results in compilation errors from inline asm using unavailable floating-point instructions. We're moving away from --with-cpu to configuring glibc based on how the compiler generates code, and it is natural to do so for --without-fp as well; in most cases the soft-float and hard-float ABIs are incompatible so you have no hope of building a working glibc with an inappropriately configured compiler or libgcc. This patch eliminates --without-fp, replacing it entirely by automatic configuration based on the compiler. Configurations for which this is relevant (coldfire / mips / powerpc32 / sh) define a variable with_fp_cond in their preconfigure fragments (under the same conditions under which those fragments do anything); this is a preprocessor conditional which the toplevel configure script then uses in a test to determine which sysdeps directories to use. The config.make with-fp variable remains. It's used only by powerpc (sysdeps/powerpc/powerpc32/Makefile) to add -mhard-float to various flags variables. For powerpc, -mcpu= options can imply use of soft-float. That could be an issue if you want to build for e.g. 476fp, but are using --with-cpu=476 because there isn't a 476fp sysdeps directory. If in future we eliminate --with-cpu and replace it entirely by testing the compiler, it would be natural at that point to eliminate that code as well (as the user should then just use a compiler defaulting to 476fp and the 476 sysdeps directory would be used automatically). Tested for x86_64, and tested with build-many-glibcs.py that installed shared libraries are unchanged by this patch. * configure.ac (--with-fp): Remove configure option. (with_fp_cond): New variable. (libc_cv_with_fp): New configure test. Use this variable instead of with_fp. * configure: Regenerated. * config.make.in (with-fp): Use @libc_cv_with_fp@. * manual/install.texi (Configuring and compiling): Remove --without-fp. * INSTALL: Regenerated. * sysdeps/m68k/preconfigure (with_fp_cond): Define for ColdFire. * sysdeps/mips/preconfigure (with_fp_cond): Define. * sysdeps/powerpc/preconfigure (with_fp_cond): Define for 32-bit. * sysdeps/sh/preconfigure (with_fp_cond): Define. * scripts/build-many-glibcs.py (Context.add_all_configs): Do not use --without-fp to configure glibc.
148 lines
3.9 KiB
Plaintext
148 lines
3.9 KiB
Plaintext
# @configure_input@
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# Don't edit this file. Put configuration parameters in configparms instead.
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version = @VERSION@
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release = @RELEASE@
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# Installation prefixes.
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install_root = $(DESTDIR)
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prefix = @prefix@
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exec_prefix = @exec_prefix@
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datadir = @datadir@
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libdir = @libdir@
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slibdir = @libc_cv_slibdir@
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rtlddir = @libc_cv_rtlddir@
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complocaledir = @libc_cv_complocaledir@
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sysconfdir = @libc_cv_sysconfdir@
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libexecdir = @libexecdir@
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rootsbindir = @libc_cv_rootsbindir@
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infodir = @infodir@
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includedir = @includedir@
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datarootdir = @datarootdir@
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localstatedir = @libc_cv_localstatedir@
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localedir = @localedir@
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multidir= @libc_cv_multidir@
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# Should we use and build ldconfig?
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use-ldconfig = @use_ldconfig@
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# Maybe the `ldd' script must be rewritten.
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ldd-rewrite-script = @ldd_rewrite_script@
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# System configuration.
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config-machine = @host_cpu@
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base-machine = @base_machine@
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config-vendor = @host_vendor@
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config-os = @host_os@
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config-sysdirs = @sysnames@
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cflags-cpu = @libc_cv_cc_submachine@
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asflags-cpu = @libc_cv_cc_submachine@
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config-extra-cflags = @libc_extra_cflags@
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config-extra-cppflags = @libc_extra_cppflags@
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config-cflags-nofma = @libc_cv_cc_nofma@
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defines = @DEFINES@
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sysheaders = @sysheaders@
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sysincludes = @SYSINCLUDES@
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c++-sysincludes = @CXX_SYSINCLUDES@
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c++-cstdlib-header = @CXX_CSTDLIB_HEADER@
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c++-cmath-header = @CXX_CMATH_HEADER@
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c++-bits-std_abs-h = @CXX_BITS_STD_ABS_H@
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all-warnings = @all_warnings@
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enable-werror = @enable_werror@
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have-z-combreloc = @libc_cv_z_combreloc@
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have-z-execstack = @libc_cv_z_execstack@
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have-protected-data = @libc_cv_protected_data@
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have-insert = @libc_cv_insert@
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have-glob-dat-reloc = @libc_cv_has_glob_dat@
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with-fp = @libc_cv_with_fp@
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enable-timezone-tools = @enable_timezone_tools@
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unwind-find-fde = @libc_cv_gcc_unwind_find_fde@
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have-fpie = @libc_cv_fpie@
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have-ssp = @libc_cv_ssp@
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stack-protector = @stack_protector@
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no-stack-protector = @no_stack_protector@
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have-selinux = @have_selinux@
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have-libaudit = @have_libaudit@
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have-libcap = @have_libcap@
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have-cc-with-libunwind = @libc_cv_cc_with_libunwind@
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fno-unit-at-a-time = @fno_unit_at_a_time@
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bind-now = @bindnow@
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have-hash-style = @libc_cv_hashstyle@
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use-default-link = @use_default_link@
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output-format = @libc_cv_output_format@
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have-cxx-thread_local = @libc_cv_cxx_thread_local@
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have-loop-to-function = @libc_cv_cc_loop_to_function@
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multi-arch = @multi_arch@
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mach-interface-list = @mach_interface_list@
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experimental-malloc = @experimental_malloc@
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nss-crypt = @libc_cv_nss_crypt@
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static-nss-crypt = @libc_cv_static_nss_crypt@
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# Configuration options.
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build-shared = @shared@
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build-pic-default= @libc_cv_pic_default@
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build-pie-default= @libc_cv_pie_default@
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build-profile = @profile@
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build-static-nss = @static_nss@
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cross-compiling = @cross_compiling@
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force-install = @force_install@
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link-obsolete-rpc = @link_obsolete_rpc@
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build-obsolete-nsl = @build_obsolete_nsl@
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build-nscd = @build_nscd@
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use-nscd = @use_nscd@
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build-hardcoded-path-in-tests= @hardcoded_path_in_tests@
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build-pt-chown = @build_pt_chown@
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have-tunables = @have_tunables@
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# Build tools.
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CC = @CC@
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CXX = @CXX@
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BUILD_CC = @BUILD_CC@
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CFLAGS = @CFLAGS@
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CPPFLAGS-config = @CPPFLAGS@
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CPPUNDEFS = @CPPUNDEFS@
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ASFLAGS-config = @ASFLAGS_config@
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AR = @AR@
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NM = @NM@
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MAKEINFO = @MAKEINFO@
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AS = $(CC) -c
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BISON = @BISON@
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AUTOCONF = @AUTOCONF@
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OBJDUMP = @OBJDUMP@
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OBJCOPY = @OBJCOPY@
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GPROF = @GPROF@
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READELF = @READELF@
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# Installation tools.
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INSTALL = @INSTALL@
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INSTALL_PROGRAM = @INSTALL_PROGRAM@
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INSTALL_SCRIPT = @INSTALL_SCRIPT@
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INSTALL_DATA = @INSTALL_DATA@
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INSTALL_INFO = @INSTALL_INFO@
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LN_S = @LN_S@
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MSGFMT = @MSGFMT@
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# Script execution tools.
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BASH = @BASH_SHELL@
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AWK = @AWK@
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PERL = @PERL@
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PYTHON = @PYTHON@
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# Additional libraries.
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LIBGD = @LIBGD@
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# Package versions and bug reporting configuration.
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PKGVERSION = @PKGVERSION@
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PKGVERSION_TEXI = @PKGVERSION_TEXI@
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REPORT_BUGS_TO = @REPORT_BUGS_TO@
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REPORT_BUGS_TEXI = @REPORT_BUGS_TEXI@
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# More variables may be inserted below by configure.
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