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* Rename configure.in to configure.ac.Paul Eggert2012-07-081-3824/+0
| | | | Fixes: debbugs:11603
* Restore deprecation warnings, except for older libpng.Paul Eggert2012-07-081-2/+14
| | | | | | * configure.in (WARN_CFLAGS): Remove -Wno-deprecated-declarations. (HAVE_LIBPNG_PNG_H): Don't bother checking for this if we have png.h. (PNG_DEPRECATED): Define when compiling with older PNG versions.
* * configure.in (WARN_CFLAGS): Add -Wno-deprecated-declarations.Andreas Schwab2012-07-071-0/+1
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* Improve static checking when configured --with-ns.Paul Eggert2012-07-071-10/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | See Samuel Bronson's remarks in <http://lists.gnu.org/archive/html/emacs-devel/2012-07/msg00146.html>. * configure.in (WARN_CFLAGS): Omit -Wunreachable-code, as it's a no-op with recent GCC and harmful in earlier ones. Omit -Wsync-nand, as it's irrelevant to Emacs and provokes a warning when compiling with ObjC. Always omit -Wunsafe-loop-optimizations, as we don't mind when optimization is being done correctly. Fix some minor --with-ns problems found by static checking. * src/frame.c (Ftool_bar_pixel_width) [!FRAME_TOOLBAR_WIDTH]: (x_set_font) [!HAVE_X_WINDOWS]: * src/image.c (xpm_load_image) [HAVE_NS]: (x_to_xcolors) [!HAVE_X_WINDOWS && !HAVE_NTGUI]: (x_disable_image) [!HAVE_NS && !HAVE_NTGUI]: Remove unused local. (Fx_parse_geometry) [HAVE_NS]: Don't return garbage. (xpm_load_image) [HAVE_NS && !HAVE_XPM]: Remove unused label. * src/image.c (x_create_bitmap_from_file) [HAVE_NS]: (xpm_load_image, xpm_load) [HAVE_NS && !HAVE_XPM]: * src/nsselect.m (symbol_to_nsstring, ns_string_to_pasteboard_internal): * src/xfaces.c (Fx_load_color_file) [!HAVE_X_WINDOWS]: Fix pointer signedness problem. * src/xfaces.c (FRAME_X_FONT_TABLE): * src/xterm.h (FRAME_X_FONT_TABLE): Remove unused, incompatible macros.
* * configure.in (BROKEN_SA_RESTART): Doc fix.Glenn Morris2012-07-071-3/+5
| | | | * src/sysdep.c, src/s/irix6-5.h: Related comments.
* Replace some src/s undefs by never even checking on relevant platformsGlenn Morris2012-07-061-19/+42
| | | | | | | | | | * configure.in: (getwd): Don't check for it on unixware. (random, rint): Don't check for these on hpux. (res_init, libresolv): Don't check for these on darwin. * src/s/darwin.h (HAVE_RES_INIT, HAVE_LIBRESOLV): * src/s/hpux10-20.h (HAVE_RINT, HAVE_RANDOM): * src/s/unixware.h (HAVE_GETWD): Move undefs to configure (effectively).
* * configure.in: Document --enable-gcc-warnings better.Paul Eggert2012-07-061-2/+4
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* Use c_strcasecmp for ASCII case-insensitive comparison.Paul Eggert2012-07-061-1/+0
| | | | Fixes: debbugs:11786
* Fix compilation with --enable-gcc-warnings and -O1Dmitry Antipov2012-07-041-0/+6
| | | | | | | | | | optimization level. * configure.in: If --enable-gcc-warnings, disable -Wunsafe-loop-optimizations for -O1 optimization level. * src/doprnt.c (doprnt): Change type of tem to int, initialize to avoid compiler warning. Add eassert. * src/search.c (simple_search): Initialize match_byte to avoid compiler warning. Add eassert.
* Make --no-site-lisp work for --enable-locallisppath elementsGlenn Morris2012-06-301-1/+3
| | | | | | | | | | | | | | | | | without "site-lisp" in the name. Ref http://debbugs.gnu.org/10208#25, point iii). * configure.in (standardlisppath): New output variable. (lisppath): Use standardlisppath. * Makefile.in (standardlisppath): New, set by configure. (epaths-force): Use standardlisppath and locallisppath rather than lisppath. * src/epaths.in (PATH_SITELOADSEARCH): New. * src/lread.c (init_lread): Use PATH_SITELOADSEARCH. * nt/paths.h (PATH_SITELOADSEARCH): New. Fixes: debbugs:11658
* * configure.in: Fix previous change. Remove --enable-asserts.Dmitry Antipov2012-06-281-14/+30
| | | | | | (CPPFLAGS): Remove conditional -DXASSERTS=1. Add --enable-link-time-optimization. * INSTALL: Mention this.
* * configure.in: Add glyphs category to --enable-checking option.Dmitry Antipov2012-06-281-3/+10
| | | | | | | | | | | | | | | | | | (GLYPH_DEBUG): Define if glyphs debugging is enabled. * src/dispextern.h (GLYPH_DEBUG): Now defined in config.h if enabled with --enable-checking=[all,glyphs] configure option. Fix GLYPH_DEBUG usage assuming that it may be undefined, adjust comments accordingly. * src/dispnew.c: Fix GLYPH_DEBUG usage assuming that it may be undefined, adjust comments accordingly. * src/image.c: Likewise. * src/scroll.c: Likewise. * src/w32fns.c: Likewise. * src/w32term.c: Likewise. * src/xdisp.c: Likewise. * src/xfaces.c: Likewise. * src/xfns.c: Likewise. * src/xterm.c: Likewise.
* Generalize run-time debugging checks.Dmitry Antipov2012-06-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * configure.in (ENABLE_CHECKING): Update comment. * src/dispextern.h (XASSERTS): Remove. * src/fontset.c (xassert): Remove. Convert from xassert to eassert. * src/alloc.c: Convert from xassert to eassert. * src/bidi.c: Likewise. * src/dispnew.c: Likewise. * src/fns.c: Likewise. * src/fringe.c: Likewise. * src/ftfont.c: Likewise. * src/gtkutil.c: Likewise. * src/image.c: Likewise. * src/keyboard.c: Likewise. * src/menu.c: Likewise. * src/process.c: Likewise. * src/scroll.c: Likewise. * src/sound.c: Likewise. * src/term.c: Likewise. * src/w32console.c: Likewise. * src/w32fns.c: Likewise. * src/w32term.c: Likewise. * src/window.c: Likewise. * src/xdisp.c: Likewise. * src/xfaces.c: Likewise. * src/xfns.c: Likewise. * src/xselect.c: Likewise. * src/xterm.c: Likewise.
* * configure.in: Don't check for sys/select.h, sys/time.h, utime.h.Paul Eggert2012-06-271-1/+0
| | | | | Emacs proper no longer uses these headers, and can rely on Gnulib for these checks.
* * configure.in: Only check for paxctl on gnu-linux.Glenn Morris2012-06-271-2/+4
| | | | | | | http://debbugs.gnu.org/11398#26 NetBSD has a "paxctl" that does not support the same options as the GNU/Linux version...
* * configure.in (AC_CHECK_FUNCS): Detect library functionsDmitry Antipov2012-06-251-0/+1
| | | | | | | | | | | strcasecmp and strncasecmp. * lib-src/etags.c (etags_strcasecmp, etags_strncasecmp): Define to library functions strcasecmp and strncasecmp if available. * lwlib/lwlib.c (my_strcasecmp): Rename to lwlib_strcasecmp, which may be defined to library function strcasecmp if available. * src/dispextern.c (xstrcasecmp): Define to library function strcasecmp if available. * src/xfaces.c: Do not use xstrcasecmp if strcasecmp is available.
* Switch from NO_RETURN to C11's _Noreturn.Paul Eggert2012-06-241-7/+0
| | | | Fixes: debbugs:11750
* * configure.in: Don't use AC_CHECK_FUNCS_ONCE, which doesn't useAndreas Schwab2012-06-231-5/+5
| | | | the correct CFLAGS and LIBS.
* Support higher-resolution time stamps.Paul Eggert2012-06-221-70/+8
| | | | Fixes: debbugs:9000
* Use a simple struct to implement compile time checks for the Lisp_Object typeAndreas Schwab2012-06-131-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * configure.in: Rename --enable-use-lisp-union-type to --enable-check-lisp-object-type and define CHECK_LISP_OBJECT_TYPE instead of USE_LISP_UNION_TYPE. * admin/make-emacs: Rename --union-type to --check-lisp-type. Define CHECK_LISP_OBJECT_TYPE insted of USE_LISP_UNION_TYPE. * admin/CPP-DEFINES (DEBUG_LISP_OBJECT_TYPE): Renamed from USE_LISP_UNION_TYPE. * src/lisp.h (Lisp_Object) [CHECK_LISP_OBJECT_TYPE]: Define as struct instead of union. (XLI, XIL): Define. (XHASH, XTYPE, XINT, XUINT, make_number, XSET, XPNTR, XUNTAG): Use them. * src/emacs.c (gdb_use_struct): Renamed from gdb_use_union. * src/.gdbinit: Check gdb_use_struct instead of gdb_use_union. * src/alloc.c (widen_to_Lisp_Object): Removed. (mark_memory): Use XIL instead of widen_to_Lisp_Object. * src/frame.c (delete_frame): Remove outdated comment. * src/w32fns.c (Fw32_register_hot_key): Use XLI instead of checking USE_LISP_UNION_TYPE. (Fw32_unregister_hot_key): Likewise. (Fw32_toggle_lock_key): Likewise. * src/w32menu.c (add_menu_item): Likewise. (w32_menu_display_help): Use XIL instead of checking USE_LISP_UNION_TYPE. * src/w32heap.c (allocate_heap): Don't check USE_LISP_UNION_TYPE. (init_heap): Likewise. * src/w32term.c (w32_read_socket): Update comment.
* Combine adjacent case blocks.Glenn Morris2012-06-121-22/+21
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* Remove src/s/sol2-10.hGlenn Morris2012-06-121-10/+27
| | | | | | | | | * configure.in (HAVE_PROCFS, _STRUCTURED_PROC): New AC_DEFINEs. (opsysfile): Set specially for sol2-10. * src/s/gnu-linux.h (HAVE_PROCFS): Move to configure. * src/s/sol2-10.h: Remove file.
* Remove src/s/hpux11.hGlenn Morris2012-06-121-0/+11
| | | | | | | * configure.in (BROKEN_SA_RESTART, USG_SUBTTY_WORKS): New AC_DEFINEs. (opsysfile): Set specially for hpux11. * src/s/hpux11.h: Remove file.
* Drop some `quotes' in configure.in's final summaryGlenn Morris2012-06-121-1/+1
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* Remove a couple of src/s filesGlenn Morris2012-06-121-0/+5
| | | | | | * configure.in (opsysfile): Set specially for gnu-kfreebsd, openbsd. * src/s/gnu-kfreebsd.h, src/s/openbsd.h: Remove files.
* Move NO_TERMIO, BROKEN_SIGIO from src/s to configureGlenn Morris2012-06-121-0/+14
| | | | | | | | | | * configure.in (NO_TERMIO, BROKEN_SIGIO): New AC_DEFINEs. * src/s/bsd-common.h, src/s/darwin.h, src/s/gnu-kfreebsd.h, src/s/hpux10-20.h: Remove NO_TERMIO. * src/s/hpux10-20.h, src/s/openbsd.h, src/s/usg5-4-common.h: Remove BROKEN_SIGIO.
* * configure.in: Coalesce some function checking.Paul Eggert2012-06-121-9/+7
| | | | | This makes 'configure' a bit smaller. Prefer AC_CHECK_FUNCS_ONCE for functions that we always check for.
* * configure.in: Anticipate platforms with no src/s file.Glenn Morris2012-06-121-6/+13
| | | | This is based on the previous treatment of src/m files.
* Fix autoconf quoting in previous changeGlenn Morris2012-06-121-1/+1
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* Handle availability of MagickMergeImageLayers and MagickExportImagePixelsChong Yidong2012-06-121-0/+1
| | | | | | | | | | * configure.in: Check for MagickMergeImageLayers. * src/image.c (imagemagick_load_image): Use MagickFlattenImage if MagickMergeImageLayers is undefined. Use pixel pusher loop if MagickExportImagePixels is undefined. Fixes: debbugs:11678
* Move SYSTEM_TYPE from src/s to configureGlenn Morris2012-06-111-0/+14
| | | | | | | | | | | | | * configure.in (SYSTEM_TYPE): New AC_DEFINE. * msdos/sed2v2.inp (SYSTEM_TYPE): Set it. * nt/config.nt (SYSTEM_TYPE): Define it. * src/s/aix4-2.h, src/s/bsd-common.h, src/s/cygwin.h, src/s/darwin.h: * src/s/gnu-kfreebsd.h, src/s/gnu-linux.h, src/s/gnu.h, src/s/hpux10-20.h: * src/s/irix6-5.h, src/s/ms-w32.h, src/s/msdos.h, src/s/template.h: * src/s/usg5-4-common.h: Remove SYSTEM_TYPE.
* * configure.in (dbus_type_is_valid): Check for library function.Michael Albinus2012-06-091-1/+3
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* Workaround dumping problem on PaX-enabled Linux kernelsUlrich Müller2012-06-031-0/+2
| | | | | | | | | | | | * configure.in (PAXCTL): Check for paxctl. * src/Makefile.in (PAXCTL): Define. (temacs$(EXEEXT)): Disable memory randomization for the temacs binary via PaX flags if the paxctl utility is available. (emacs$(EXEEXT), bootstrap-emacs$(EXEEXT)): Restore PaX flags to their default. Fixes: debbugs:11398
* Remove --disable-maintainer-mode option from 'configure'. (Bug#11555)Paul Eggert2012-06-011-13/+0
| | | | | | | | | | | It is confusingly named and rarely useful. See, for example, <http://lists.gnu.org/archive/html/emacs-devel/2011-12/msg00089.html>. * INSTALL.BZR: Don't mention --disable-maintainer-mode. * Makefile.in (MAINTAINER_MODE_FLAG): Remove; all uses removed. * configure.in: Remove --disable-maintainer-mode. (USE_MAINTAINER_MODE, MAINT): Remove. * admin/make-tarball.txt: Don't worry about maintainer mode. * etc/NEWS: Mention this.
* Make 'configure' a bit smaller and faster.Paul Eggert2012-05-271-18/+19
| | | | | | | | | | | | | | * configure.in (INSTALL_INFO): Set it with one call to AC_PATH_PROG, not three. (PKG_CONFIG): Hoist this out of PKG_CHECK_MODULES, since it's so likely that it'll be needed. (AC_CHECK_HEADERS_ONCE): Prefer to AC_CHECK_HEADERS where either works. (AC_PROG_MAKE_SET): Remove; Automake does this. (sysinfo): Do not check for this function, as it's never used. (tzset): Check for this function just once. * admin/CPP-DEFINES: Remove HAVE_SYSINFO. * m4/manywarnings.m4: Sync from gnulib, incorporating the following: 2012-05-27 manywarnings: remove duplicate -Wmultichar entry
* Assume gnulib does largefile.Paul Eggert2012-05-271-3/+0
| | | | | | | | Gnulib does the largefile configuration anyway, so when configure.in invokes AC_SYS_LARGEFILE, that bloats 'configure' unnecessarily. * admin/merge-gnulib (GNULIB_MODULES): Add largefile. * configure.in (AC_SYS_LARGEFILE): Remove. * lib/gnulib.mk: Autoupdate.
* Remove src/m/*.Paul Eggert2012-05-221-138/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * configure.in: Remove all mention of src/m/*. (machine, machfile, M_FILE, config_machfile, and_machfile): Remove. All uses removed. (BITS_PER_CHAR, BITS_PER_SHORT, BITS_PER_INT, BITS_PER_LONG) (BITS_PER_LONG_LONG): Move to src/lisp.h. * lib/makefile.w32-in: Remove dependencies on $(EMACS_ROOT)/src/m/intel386.h. * make-dist: Don't make links to src/m. * admin/CPP-DEFINES: Do not mention src/m/*.h. (BITS_PER_EMACS_INT, BITS_PER_LONG, BITS_PER_CHAR) (BITS_PER_SHORT, BITS_PER_INT): Remove. * admin/MAINTAINERS: Remove src/m/. * lib-src/makefile.w32-in: Remove dependencies on $(EMACS_ROOT)/src/m/intel386.h. * msdos/mainmake.v2 (TAGS tags): Don't look at $(CURDIR)/src/m/intel386.h. * nt/config.nt: Do not include "m/intel386.h"; file was removed. (BITS_PER_CHAR, BITS_PER_SHORT, BITS_PER_INT, BITS_PER_LONG): Move to src/lisp.h. (EMACS_INT_MAX): New macro. This directory predates autoconf and is no longer needed nowadays. Move its few remaining bits of functionality to where they're needed. * src/m/README, src/m/alpha.h, src/m/amdx86-64.h, src/m/ia64.h, src/m/ibmrs6000.h: * src/m/ibms390x.h, src/m/intel386.h, src/m/m68k.h, src/m/macppc.h: * src/m/sparc.h, src/m/template.h: Remove. * src/Makefile.in (M_FILE): Remove. All uses removed. * src/alloc.c (POINTERS_MIGHT_HIDE_IN_OBJECTS): * src/lisp.h (USE_LSB_TAG): * src/mem-limits.h (EXCEEDS_LISP_PTR): Use VAL_MAX, not VALBITS, in #if. * src/lisp.h (EMACS_INT_MAX): New macro, useful in #if. (EMACS_UINT): Define unconditionally now. (BITS_PER_CHAR, BITS_PER_SHORT, BITS_PER_INT, BITS_PER_LONG) (BITS_PER_EMACS_INT): New constants, replacing what used to be in config.h, but not useful in #if. (GCTYPEBITS, VALBITS): Define unconditionally, since m/* files don't define them any more. (VAL_MAX): New macro. (VALMASK): Use it. * src/puresize.h (PURESIZE_RATIO): Use EMACS_INT_MAX, not BITS_PER_EMACS_INT, in #if. * src/s/aix4-2.h (BROKEN_FIONREAD, BROKEN_SIGAIO, BROKEN_SIGPTY) (BROKEN_SIGPOLL): Move here from m/ibmrs6000.h, which was removed. * src/s/gnu-linux.h (ULIMIT_BREAK_VALUE) [__i386__]: * src/s/ms-w32.h (DATA_START): Move here from removed file m/intel386.h. * src/s/gnu.h (NLIST_STRUCT): Remove undef; 'configure' does this. * src/s/irix6-5.h (_LP64): Remove; lisp.h no longer needs this.
* Assume C89 or later.Paul Eggert2012-05-211-25/+0
| | | | | | | | | | | | | | | | | | | * configure.in (AC_C_PROTOTYPES, AC_C_VOLATILE, AC_C_CONST) (POINTER_TYPE, PROTOTYPES): Remove. * admin/CPP-DEFINES: Remove NULL, const. * lib-src/etags.c (static, const): Remove macros. (PTR): Remove; all uses replaced with void *. Omit needless casts. * src/alloc.c, src/buffer.c, lisp.h: Replace POINTER_TYPE with void. * alloc.c (overrun_check_malloc, overrun_check_realloc, xmalloc) (xrealloc): * buffer.c (mmap_free_1, mmap_enlarge): Omit needless casts. * editfns.c, fns.c, gmalloc.c, insdel.c, sysdep.c, termcap.c (NULL): * textprop.c, tparam.c (NULL): Remove. * ralloc.c, vm-limit.c (POINTER): Assume void * works. * regex.c (SIGN_EXTEND_CHAR): Assume signed char works. * regex.h (_RE_ARGS): Remove. All uses rewritten to use prototypes. * unexelf.c (ElfBitsW): Assume c89 preprocessor or better. * xterm.c (input_signal_count): Assume volatile works.
* Rename LEIM_INSTALLDIR to leimdir, treat consistently with lispdirGlenn Morris2012-05-211-3/+3
| | | | | | | | * configure.in (LEIM_INSTALLDIR): Rename to leimdir, treat like lispdir. * leim/Makefile.in (install_prefix): Remove. (LEIM_INSTALLDIR): Rename to leimdir. (install): Update for this change.
* Remove unused HAVE_* symbols for functions.Paul Eggert2012-05-191-6/+6
| | | | | | | | | | | | * configure.in (AC_CHECK_FUNCS): Remove XSetWMProtocols, getdomainname, mblen (twice), mbrlen (twice), mbsinit, ualarm, getsockopt, setsockopt, mremap, mempcpy. * admin/CPP-DEFINES (HAVE_GETDOMAINNAME): Remove. * msdos/sed2v2.inp (HAVE_MBLEN): Remove. * msdos/sed2x.inp (HAVE_XSETWMPROTOCOLS): Remove. * nt/config.nt (HAVE_GETDOMAINNAME, HAVE_XSETWMPROTOCOLS) (HAVE_GETSOCKOPT, HAVE_SETSOCKOPT): Remove; not needed. * src/s/ms-w32.h (HAVE_GETDOMAINNAME): Remove; not needed.
* Remove no-longer-used macro HAVE_FTIME.Paul Eggert2012-05-191-3/+1
| | | | | | | | | | * configure.in (machine): Do not set to 'vax', since src/m/vax.h is being removed. (AC_CHECK_FUNCS): Remove ftime. * admin/CPP-DEFINES (HAVE_FTIME): Remove. * nt/config.nt (HAVE_FTIME): Remove undef; not needed. * src/m/vax.h: Remove; no longer needed since HAVE_FTIME is being removed. * src/s/ms-w32.h (HAVE_FTIME): Remove; not needed.
* * configure.in (mandir): May as well include it in the NS app bundle.Glenn Morris2012-05-181-0/+1
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* Avoid installation followed by immediate deletion for self-contained nsGlenn Morris2012-05-181-0/+3
| | | | | | * configure.in (INSTALL_ARCH_INDEP_EXTRA): New output variable. * Makefile.in (INSTALL_ARCH_INDEP_EXTRA): New, set by configure. (install-arch-indep): Don't install-etc for self-contained ns builds.
* Stop adding Fink directories to search path on OS XGlenn Morris2012-05-181-6/+6
| | | | | | | | | * configure.in (GCC_TEST_OPTIONS, NON_GCC_TEST_OPTIONS) <darwin>: No longer unconditonally add /sw directories. * etc/NEWS: Mention this. Fixes: debbugs:2280
* Minor optimization for install of self-contained NS info filesGlenn Morris2012-05-161-0/+3
| | | | | | * configure.in (etcdir): For a self-contained ns build, set it to the appropriate values. * Makefile.in (install-arch-dep): No need to move info/ any more.
* Set more installation directories for self-contained ns buildsGlenn Morris2012-05-161-0/+3
| | | | | * configure.in (docdir, etcdir, lispdir): For a self-contained ns build, set these to the appropriate values.
* Fix previous change, for NS builds that are not self-containedGlenn Morris2012-05-161-0/+3
| | | | | | * configure.in (ns_self_contained): New output variable. * Makefile.in (ns_self_contained): New, set by configure. (install-arch-dep): Use $ns_self_contained.
* Install a self-contained NS build's libexec directly into the right placeGlenn Morris2012-05-161-1/+3
| | | | | | | | | | | | | This is rather than installing it in one place then moving it. * configure.in (archlibdir): Set it for self-contained ns builds. (libexecdir): Don't expand it now (this is mainly cosmetic). * Makefile.in (ns_appbindir, ns_appresdir): Move them before things that may refer to them. (install-arch-dep): No need to relocate self-contained ns libexec. * lib-src/Makefile.in (ns_appbindir): New, set by configure.
* * configure.in: Simplify by removing CPP etc.Paul Eggert2012-05-161-121/+14
| | | | | | | | | | | (CPP_TEST_OPTIONS, NON_GNU_CPP, cc_specified, SPECIFIED_CFLAGS) (SPECIFED_CPP, CPP, NON_GNU_CC, AC_PROG_CPP): Remove; not needed. In particular we no longer need to fiddle with CPP, since we don't use CPP specially any more. (gl_EARLY): Invoke this after adjusting CC, so that it uses the adjusted compiler. (AC_PROG_INSTALL, AC_PROG_MKDIR_P, AC_PROG_RANLIB): Comment out, since gl_EARLY and/or Autoconf already does these.
* Try to fix building with gcc >= 4.6 on Darwin.Glenn Morris2012-05-151-8/+56
| | | | | | | | | | | | Eg, hydra builds have been failing for some time because (?) of this. In gcc < 4.6, unrecognized -no-fo options just cause a warning. In 4.6 and later, they cause an error. * configure.in: (CPP): Do not unconditionally set it on Darwin. Instead, try to test if -no-cpp-precomp is accepted. (CPP_TEST_OPTIONS, SPECIFIED_CPP): New. Fixes: debbugs:9755
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