src/png/configure.ac

   1 # configure.ac
   2
   3 dnl Process this file with autoconf to produce a configure script.
   4 dnl
   5 dnl Minor upgrades (compatible ABI): increment the package version
   6 dnl (third field in two places below) and set the PNGLIB_RELEASE
   7 dnl variable.
   8 dnl
   9 dnl Major upgrades (incompatible ABI): increment the package major
  10 dnl version (second field, or first if desired), set the minor
  11 dnl to 0, set PNGLIB_MAJOR below *and* follow the instructions in
  12 dnl Makefile.am to upgrade the package name.
  13
  14 dnl This is here to prevent earlier autoconf from being used, it
  15 dnl should not be necessary to regenerate configure if the time
  16 dnl stamps are correct
  17 AC_PREREQ(2.59)
  18
  19 dnl Version number stuff here:
  20
  21 AC_INIT([libpng], [1.5.7], [png-mng-implement@lists.sourceforge.net])
  22 AM_INIT_AUTOMAKE
  23 dnl stop configure from automagically running automake
  24 AM_MAINTAINER_MODE
  25
  26 PNGLIB_VERSION=1.5.7
  27 PNGLIB_MAJOR=1
  28 PNGLIB_MINOR=5
  29 PNGLIB_RELEASE=7
  30
  31 dnl End of version number stuff
  32
  33 AC_CONFIG_SRCDIR([pngget.c])
  34 AM_CONFIG_HEADER(config.h)
  35
  36 # Checks for programs.
  37 AC_LANG([C])
  38 AC_PROG_CC
  39 AM_PROG_AS
  40 AC_PROG_LD
  41 AC_PROG_CPP
  42 AC_CHECK_TOOL(SED, sed, :)
  43 AC_CHECK_TOOL(AWK, awk, :)
  44 AC_PROG_INSTALL
  45 AC_PROG_LN_S
  46 AC_PROG_MAKE_SET
  47 LT_INIT([win32-dll])
  48
  49 # On Solaris 10 and 12 CPP gets set to cc -E, however this still
  50 # does some input parsing.  We need strict ANSI-C style tokenization,
  51 # check this:
  52 AC_REQUIRE_CPP
  53 AC_MSG_CHECKING([for a C preprocessor that does not parse its input])
  54 AC_TRY_CPP([1.5.0 16BIT],
  55    [DFNCPP="$CPP"],
  56    [DFNCPP=""
  57    sav_CPP="$CPP"
  58    for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp"; do
  59       AC_TRY_CPP([1.5.0 16BIT],
  60          [DFNCPP="$CPP"]
  61          [break],,)
  62    done
  63    CPP="$sav_CPP"])
  64 if test -n "$DFNCPP"; then
  65    AC_MSG_RESULT([$DFNCPP])
  66    AC_SUBST(DFNCPP)
  67 else
  68    AC_MSG_FAILURE([not found], 1)
  69 fi
  70
  71 # Checks for header files.
  72 AC_HEADER_STDC
  73 AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h])
  74
  75 # Checks for typedefs, structures, and compiler characteristics.
  76 AC_C_CONST
  77 AC_TYPE_SIZE_T
  78 AC_STRUCT_TM
  79 AC_C_RESTRICT
  80
  81 # Checks for library functions.
  82 AC_FUNC_STRTOD
  83 AC_CHECK_FUNCS([memset], , AC_ERROR([memset not found in libc]))
  84 AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_ERROR([cannot find pow])) )
  85 AC_ARG_WITH(zlib-prefix,
  86    AC_HELP_STRING([--with-zlib-prefix],
  87                   [prefix that may have been used in installed zlib]),
  88                   [ZPREFIX=${withval}],
  89                   [ZPREFIX='z_'])
  90 AC_CHECK_LIB(z, zlibVersion, ,
  91     AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, ,
  92                  AC_ERROR([zlib not installed])))
  93
  94 # The following is for pngvalid, to ensure it catches FP errors even on
  95 # platforms that don't enable FP exceptions, the function appears in the math
  96 # library (typically), it's not an error if it is not found.
  97 AC_CHECK_LIB([m], [feenableexcept])
  98 AC_CHECK_FUNCS([feenableexcept])
  99
 100 LIBPNG_DEFINES=-DPNG_CONFIGURE_LIBPNG
 101 LIBPNG_DEFINES=$LIBPNG_DEFINES
 102 AC_SUBST(LIBPNG_DEFINES)
 103
 104 AC_MSG_CHECKING([if libraries can be versioned])
 105
 106 AC_MSG_CHECKING([if using Solaris linker])
 107 SLD=`$LD --version 2>&1 | grep Solaris`
 108 if test "$SLD"; then
 109     have_solaris_ld=yes
 110     AC_MSG_RESULT(yes)
 111 else
 112     have_solaris_ld=no
 113     AC_MSG_RESULT(no)
 114 fi
 115 AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes")
 116
 117 # Special case for PE/COFF platforms: ld reports
 118 # support for version-script, but doesn't actually
 119 # DO anything with it.
 120 case $host in
 121 *cygwin* | *mingw32* | *interix* )
 122     have_ld_version_script=no
 123     AC_MSG_RESULT(no)
 124 ;;
 125 * )
 126
 127 if test "$have_solaris_ld" = "yes"; then
 128     GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'`
 129 else
 130     GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
 131 fi
 132
 133 if test "$GLD"; then
 134     have_ld_version_script=yes
 135     AC_MSG_RESULT(yes)
 136 else
 137     have_ld_version_script=no
 138     AC_MSG_RESULT(no)
 139     AC_MSG_WARN(*** You have not enabled versioned symbols.)
 140 fi
 141 ;;
 142 esac
 143
 144 AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
 145
 146 if test "$have_ld_version_script" = "yes"; then
 147     AC_MSG_CHECKING([for symbol prefix])
 148     SYMBOL_PREFIX=`echo "PREFIX=__USER_LABEL_PREFIX__" \
 149                    | ${CPP-${CC-gcc} -E} - 2>&1 \
 150                    | ${EGREP-grep} "^PREFIX=" \
 151                    | ${SED-sed} "s:^PREFIX=::"`
 152     AC_SUBST(SYMBOL_PREFIX)
 153     AC_MSG_RESULT($SYMBOL_PREFIX)
 154 fi
 155
 156 # Substitutions for .in files
 157 AC_SUBST(PNGLIB_VERSION)
 158 AC_SUBST(PNGLIB_MAJOR)
 159 AC_SUBST(PNGLIB_MINOR)
 160 AC_SUBST(PNGLIB_RELEASE)
 161
 162 # Additional arguments (and substitutions)
 163 # Allow the pkg-config directory to be set
 164 AC_ARG_WITH(pkgconfigdir,
 165         AC_HELP_STRING([--with-pkgconfigdir],
 166         [Use the specified pkgconfig dir (default is libdir/pkgconfig)]),
 167         [pkgconfigdir=${withval}],
 168         [pkgconfigdir='${libdir}/pkgconfig'])
 169
 170 AC_SUBST([pkgconfigdir])
 171 AC_MSG_NOTICE([pkgconfig directory is ${pkgconfigdir}])
 172
 173 # Make the *-config binary config scripts optional
 174 AC_ARG_WITH(binconfigs,
 175         AC_HELP_STRING([--with-binconfigs],
 176                 [Generate shell libpng-config scripts as well as pkg-config data]
 177                 [@<:@default=yes@:>@]),
 178         [if test "${withval}" = no; then
 179                 binconfigs=
 180                 AC_MSG_NOTICE([libpng-config scripts will not be built])
 181         else
 182                 binconfigs='${binconfigs}'
 183         fi],
 184         [binconfigs='${binconfigs}'])
 185 AC_SUBST([binconfigs])
 186
 187 # Because GCC by default assembles code with an executable stack, even though it
 188 # compiles C code with a non-executable stack, it is necessary to do a fixup
 189 # here (this may by GCC specific)
 190 AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
 191
 192 AC_ARG_ENABLE([arm-neon],
 193         AC_HELP_STRING([--enable-arm-neon], [Enable ARM NEON optimizations]),
 194         [if test "${enableval}" = yes; then
 195                 AC_DEFINE([PNG_ARM_NEON], [1], [Enable ARM NEON optimizations])
 196                 AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [1], [Align row buffers])
 197         fi])
 198 AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" = yes])
 199
 200 # Config files, substituting as above
 201 AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in])
 202 AC_CONFIG_FILES([libpng-config:libpng-config.in],
 203                 [chmod +x libpng-config])
 204
 205 AC_OUTPUT