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1 dnl Process this file with autoconf to produce a configure script.
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2
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3 sinclude(../config/enable.m4)
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4 sinclude(../config/tls.m4)
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5 sinclude(../config/acx.m4)
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6 sinclude(../config/no-executables.m4)
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7 sinclude(../config/override.m4)
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8
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9 AC_PREREQ(2.59)
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10 AC_INIT([GNU C Runtime Library], 1.0,,[libgcc])
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11 AC_CONFIG_SRCDIR([static-object.mk])
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12
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13 AC_ARG_WITH(target-subdir,
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14 [ --with-target-subdir=SUBDIR Configuring in a subdirectory for target])
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15 AC_ARG_WITH(cross-host,
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16 [ --with-cross-host=HOST Configuring with a cross compiler])
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17 AC_ARG_WITH(ld,
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18 [ --with-ld arrange to use the specified ld (full pathname)])
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19
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20 if test "${srcdir}" = "."; then
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21 if test -n "${with_build_subdir}"; then
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22 libgcc_topdir="${srcdir}/../.."
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23 with_target_subdir=
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24 elif test -z "${with_target_subdir}"; then
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25 libgcc_topdir="${srcdir}/.."
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26 else
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27 if test "${with_target_subdir}" != "."; then
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28 libgcc_topdir="${srcdir}/${with_multisrctop}../.."
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29 else
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30 libgcc_topdir="${srcdir}/${with_multisrctop}.."
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31 fi
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32 fi
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33 else
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34 libgcc_topdir="${srcdir}/.."
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35 fi
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36 AC_SUBST(libgcc_topdir)
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37 AC_CONFIG_AUX_DIR($libgcc_topdir)
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38
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39 AC_ARG_ENABLE(shared,
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40 [ --disable-shared don't provide a shared libgcc],
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41 [
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42 case $enable_shared in
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43 yes | no) ;;
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44 *)
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45 enable_shared=no
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46 IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
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47 for pkg in $enableval; do
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48 if test "X$pkg" = "Xgcc" || test "X$pkg" = "Xlibgcc"; then
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49 enable_shared=yes
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50 fi
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51 done
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52 IFS="$ac_save_ifs"
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53 ;;
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54 esac
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55 ], [enable_shared=yes])
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56 AC_SUBST(enable_shared)
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57
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58 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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59 AC_ARG_ENABLE(version-specific-runtime-libs,
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60 [ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
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61 [case "$enableval" in
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62 yes) version_specific_libs=yes ;;
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63 no) version_specific_libs=no ;;
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64 *) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
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65 esac],
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66 [version_specific_libs=no])
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67 AC_MSG_RESULT($version_specific_libs)
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68
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69 AC_ARG_WITH(slibdir,
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70 [ --with-slibdir=DIR shared libraries in DIR [LIBDIR]],
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71 slibdir="$with_slibdir",
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72 if test "${version_specific_libs}" = yes; then
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73 slibdir='$(libsubdir)'
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74 elif test -n "$with_cross_host" && test x"$with_cross_host" != x"no"; then
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75 slibdir='$(exec_prefix)/$(host_noncanonical)/lib'
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76 else
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77 slibdir='$(libdir)'
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78 fi)
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79 AC_SUBST(slibdir)
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80
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81 AC_PROG_INSTALL
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82
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83 AC_PROG_AWK
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84 # We need awk; bail out if it's missing.
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85 case ${AWK} in
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86 "") AC_MSG_ERROR([can't build without awk, bailing out]) ;;
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87 esac
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88
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89 AC_CANONICAL_HOST
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90 ACX_NONCANONICAL_HOST
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91 GCC_TOPLEV_SUBDIRS
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92
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93 dnl These must be called before AM_PROG_LIBTOOL, because it may want
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94 dnl to call AC_CHECK_PROG.
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95 AC_CHECK_TOOL(AR, ar)
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96 AC_CHECK_TOOL(LIPO, lipo, :)
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97 AC_CHECK_TOOL(NM, nm)
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98 AC_CHECK_TOOL(RANLIB, ranlib, :)
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99 AC_CHECK_TOOL(STRIP, strip, :)
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100 AC_PROG_LN_S
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101
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102 GCC_NO_EXECUTABLES
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103 AC_PROG_CC
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104 AC_PROG_CPP_WERROR
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105
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106 # Check for decimal float support.
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107 AC_CACHE_CHECK([whether decimal floating point is supported], [libgcc_cv_dfp],
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108 [AC_COMPILE_IFELSE([_Decimal32 x;], [libgcc_cv_dfp=yes],
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109 [libgcc_cv_dfp=no])])
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110 decimal_float=$libgcc_cv_dfp
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111 AC_SUBST(decimal_float)
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112
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113 AC_ARG_ENABLE(decimal-float,
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114 [ --enable-decimal-float={no,yes,bid,dpd}
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115 enable decimal float extension to C. Selecting 'bid'
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116 or 'dpd' choses which decimal floating point format
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117 to use],
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118 [
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119 case $enable_decimal_float in
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120 yes | no | bid | dpd) ;;
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121 *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
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122 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
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123 esac
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124 ],
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125 [
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126 case $host in
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127 powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
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128 enable_decimal_float=yes
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129 ;;
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130 *)
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131 enable_decimal_float=no
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132 ;;
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133 esac
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134 ])
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135
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136 # x86's use BID format instead of DPD
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137 if test x$enable_decimal_float = xyes; then
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138 case $host in
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139 i?86*-*-linux* | x86_64*-*-linux*)
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140 enable_decimal_float=bid
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141 ;;
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142 *)
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143 enable_decimal_float=dpd
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144 ;;
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145 esac
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146 fi
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147 AC_SUBST(enable_decimal_float)
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148
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149 # Check for fixed-point support.
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150 AC_CACHE_CHECK([whether fixed-point is supported], [libgcc_cv_fixed_point],
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151 [AC_COMPILE_IFELSE([_Sat _Fract x;], [libgcc_cv_fixed_point=yes],
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152 [libgcc_cv_fixed_point=no])])
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153 fixed_point=$libgcc_cv_fixed_point
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154 AC_SUBST(fixed_point)
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155
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156 # Check 32bit or 64bit for x86.
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157 case ${host} in
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158 i?86*-*-* | x86_64*-*-*)
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159 cat > conftest.c <<EOF
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160 #ifdef __x86_64__
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161 host_address=64
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162 #else
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163 host_address=32
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164 #endif
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165 EOF
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166 eval `${CC-cc} -E conftest.c | grep host_address=`
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167 rm -f conftest.c
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168 ;;
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169 esac
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170
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171 # Collect host-machine-specific information.
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172 . ${srcdir}/config.host
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173
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174 # Check if Solaris/x86 linker supports ZERO terminator unwind entries.
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175 # This is after config.host so we can augment tmake_file.
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176 # Link with -nostartfiles -nodefaultlibs since neither are present while
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177 # building libgcc.
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178 case ${host} in
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179 i?86-*-solaris2.1[[0-9]]*)
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180 cat > conftest.s <<EOF
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181 .section .eh_frame,"a",@unwind
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182 .zero 4
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183 .section .jcr,"aw",@progbits
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184 .zero 8
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185 EOF
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186 if AC_TRY_COMMAND(${CC-cc} -shared -nostartfiles -nodefaultlibs -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD); then
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187 # configure expects config files in libgcc/config, so need a relative
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188 # path here.
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189 tmake_file="${tmake_file} ../../gcc/config/i386/t-crtstuff"
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190 fi
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191 ;;
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192 esac
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193
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194 # Check for visibility support. This is after config.host so that
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195 # we can check for asm_hidden_op.
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196 AC_CACHE_CHECK([for __attribute__((visibility("hidden")))],
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197 libgcc_cv_hidden_visibility_attribute, [
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198 echo 'int __attribute__ ((visibility ("hidden"))) foo (void) { return 1; }' > conftest.c
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199 libgcc_cv_hidden_visibility_attribute=no
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200 if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then
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201 if grep "\\$asm_hidden_op.*foo" conftest.s >/dev/null; then
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202 libgcc_cv_hidden_visibility_attribute=yes
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203 fi
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204 fi
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205 rm -f conftest.*
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206 ])
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207
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208 if test $libgcc_cv_hidden_visibility_attribute = yes; then
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209 vis_hide='-fvisibility=hidden -DHIDE_EXPORTS'
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210 else
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211 vis_hide=
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212 fi
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213 AC_SUBST(vis_hide)
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214
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215 # See if we have thread-local storage. We can only test assembler
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216 # sicne link-time and run-time tests require the newly built
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217 # gcc, which can't be used to build executable due to that libgcc
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218 # is yet to be built here.
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219 GCC_CHECK_CC_TLS
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220 set_have_cc_tls=
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221 if test "$enable_tls $gcc_cv_have_cc_tls" = "yes yes"; then
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222 set_have_cc_tls="-DHAVE_CC_TLS"
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223 fi
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224 AC_SUBST(set_have_cc_tls)
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225
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226 # Conditionalize the makefile for this target machine.
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227 tmake_file_=
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228 for f in ${tmake_file}
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229 do
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230 if test -f ${srcdir}/config/$f
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231 then
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232 tmake_file_="${tmake_file_} \$(srcdir)/config/$f"
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233 fi
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234 done
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235 tmake_file="${tmake_file_}"
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236 AC_SUBST(tmake_file)
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237
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238 # Substitute configuration variables
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239 AC_SUBST(extra_parts)
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240 AC_SUBST(asm_hidden_op)
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241
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242 # We need multilib support.
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243 AC_CONFIG_FILES([Makefile])
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244 AC_CONFIG_COMMANDS([default],
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245 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
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246 if test -n "$CONFIG_FILES"; then
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247 # FIXME: We shouldn't need to set ac_file
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248 ac_file=Makefile
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249 . ${libgcc_topdir}/config-ml.in
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250 fi]],
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251 [[srcdir=${srcdir}
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252 host=${host}
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253 with_target_subdir=${with_target_subdir}
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254 with_multisubdir=${with_multisubdir}
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255 ac_configure_args="--enable-multilib ${ac_configure_args}"
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256 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
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257 libgcc_topdir=${libgcc_topdir}
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258 CC="${CC}"
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259 ]])
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260 AC_OUTPUT
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