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Add NO_CPLUSPLUS config option, to skip c++ support entirely.
author Rob Landley <rob@landley.net>
date Sun, 20 Jun 2010 16:25:35 -0500
parents 1f51b4a0517b
children 3a959ee85558
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Build binutils, c wrapper, and uClibc++
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2
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3 # PROGRAM_PREFIX affects the name of the generated tools, ala "${ARCH}-".
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4
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5 # Force gcc to build, largely against its will.
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6
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7 setupfor gcc-core build-gcc
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8 [ -z "$NO_CPLUSPLUS" ] && setupfor gcc-g++ build-gcc gcc-core
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9
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10 # GCC tries to "help out in the kitchen" by screwing up the kernel include
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11 # files. Surgery with sed to cut out that horrible idea throw it away.
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12
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13 sed -i 's@^STMP_FIX.*@@' "${CURSRC}/gcc/Makefile.in" || dienow
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14
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15 # The gcc ./configure manages to make the binutils one look sane. Again,
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16 # wrap it so we can call it with different variables to beat sense out of it.
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17
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18 function configure_gcc()
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19 {
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20 # Are we building C only, or C and C++?
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21 [ -z "$NO_CPLUSPLUS" ] &&
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22 STUFF="--enable-languages=c,c++ --disable-libstdcxx-pch" ||
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23 STUFF="--enable-languages=c"
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24
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25 # Configure gcc
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26 "$CURSRC/configure" --target="$CROSS_TARGET" --prefix="$STAGE_DIR" \
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27 --disable-multilib --disable-nls --enable-c99 --enable-long-long \
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28 --enable-__cxa_atexit $STUFF --program-prefix="$PROGRAM_PREFIX" \
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29 "$@" $GCC_FLAGS &&
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30
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31 # Provide xgcc as a symlink to the target compiler, so gcc doesn't waste
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32 # time trying to rebuild itself with itself. (If we want that, we'll do it
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33 # ourselves via canadian cross.)
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34 mkdir -p gcc &&
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35 ln -s "$(which ${CC_FOR_TARGET:-cc})" gcc/xgcc || dienow
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36 }
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37
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38 if [ -z "$HOST_ARCH" ]
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39 then
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40 # Produce a standard host->target cross compiler, which does not include
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41 # thread support or libgcc_s.so to make it depend on the host less.
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42
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43 # The only prerequisite for this is binutils, above. (It doesn't even
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44 # require a C library for the target to exist yet, which is good because you
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45 # have a chicken and egg problem otherwise. What would you have compiled
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46 # that C library _with_?)
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47
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48 AR_FOR_TARGET="${ARCH}-ar" configure_gcc \
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49 --disable-threads --disable-shared --host="$CROSS_HOST"
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50 else
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51 # Canadian cross a compiler to run on $HOST_ARCH as its host and output
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52 # binaries for $ARCH as its target.
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53
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54 # GCC has some deep assumptions here, which are wrong. Lots of redundant
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55 # corrections are required to make it stop.
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56
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57 CC="${HOST_ARCH}-cc" AR="${HOST_ARCH}-ar" AS="${HOST_ARCH}-as" \
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58 LD="${HOST_ARCH}-ld" NM="${HOST_ARCH}-nm" \
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59 CC_FOR_TARGET="${ARCH}-cc" AR_FOR_TARGET="${ARCH}-ar" \
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60 NM_FOR_TARGET="${ARCH}-nm" GCC_FOR_TARGET="${ARCH}-cc" \
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61 AS_FOR_TARGET="${ARCH}-as" LD_FOR_TARGET="${ARCH}-ld" \
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62 CXX_FOR_TARGET="${ARCH}-c++" \
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63 ac_cv_path_AR_FOR_TARGET="${ARCH}-ar" \
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64 ac_cv_path_RANLIB_FOR_TARGET="${ARCH}-ranlib" \
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65 ac_cv_path_NM_FOR_TARGET="${ARCH}-nm" \
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66 ac_cv_path_AS_FOR_TARGET="${ARCH}-as" \
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67 ac_cv_path_LD_FOR_TARGET="${ARCH}-ld" \
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68 configure_gcc --enable-threads=posix --enable-shared \
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69 --build="$CROSS_HOST" --host="$CROSS_TARGET"
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70 fi
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71
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72 # Now that it's configured, build and install gcc
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73
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74 make -j $CPUS configure-host &&
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75 make -j $CPUS all-gcc LDFLAGS="$STATIC_FLAGS" &&
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76
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77 mkdir -p "$STAGE_DIR"/cc/lib || dienow
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78
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79 if [ ! -z "$HOST_ARCH" ] && [ -z "$NO_CPLUSPLUS" ]
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80 then
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81 # We also need to beat libsupc++ out of gcc (which uClibc++ needs to build).
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82 # But don't want to build the whole of libstdc++-v3 because
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83 # A) we're using uClibc++ instead, B) the build breaks.
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84
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85 # The libsupc++ ./configure dies if run after the simple cross compiling
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86 # ./configure, because gcc's build system is overcomplicated crap, so skip
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87 # the uClibc++ build first time around and only do it for the canadian cross
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88 # builds. (The simple cross compiler still needs basic C++ support to build
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89 # the C++ libraries with, though.)
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90
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91 make -j $CPUS configure-target-libstdc++-v3 &&
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92 cd "$CROSS_TARGET"/libstdc++-v3/libsupc++ &&
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93 make -j $CPUS &&
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94 mv .libs/libsupc++.a "$STAGE_DIR"/cc/lib &&
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95 cd ../../.. || dienow
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96 fi
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97
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98 # Work around gcc bug during the install: we disabled multilib but it doesn't
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99 # always notice.
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100
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101 ln -s lib "$STAGE_DIR/lib64" &&
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102 make -j $CPUS install-gcc &&
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103 rm "$STAGE_DIR/lib64" || dienow
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104
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105 # Move the gcc internal libraries and headers somewhere sane
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106
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107 rm -rf "$STAGE_DIR"/lib/gcc/*/*/install-tools 2>/dev/null
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108 mv "$STAGE_DIR"/lib/gcc/*/*/include "$STAGE_DIR"/cc/include &&
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109 mv "$STAGE_DIR"/lib/gcc/*/*/* "$STAGE_DIR"/cc/lib &&
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110
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111 # Move the compiler internal binaries into "tools"
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112 ln -s "$CROSS_TARGET" "$STAGE_DIR/tools" &&
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113 cp "$STAGE_DIR/libexec/gcc/"*/*/c* "$STAGE_DIR/tools/bin" &&
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114 rm -rf "$STAGE_DIR/libexec" || dienow
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115
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116 # collect2 is evil, kill it.
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117 # ln -sf ../../../../tools/bin/ld ${STAGE_DIR}/libexec/gcc/*/*/collect2 || dienow
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118
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119 # Prepare for ccwrap
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120
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121 mv "$STAGE_DIR/bin/${PROGRAM_PREFIX}gcc" "$STAGE_DIR/tools/bin/cc" &&
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122 ln -sf "${PROGRAM_PREFIX}cc" "$STAGE_DIR/bin/${PROGRAM_PREFIX}gcc" &&
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123 ln -s cc "$STAGE_DIR/tools/bin/rawcc" &&
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124
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125 # Wrap C++ too.
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126
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127 if [ -z "$NO_CPLUSPLUS" ]
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128 then
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129 mv "$STAGE_DIR/bin/${PROGRAM_PREFIX}g++" "$STAGE_DIR/tools/bin/c++" &&
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130 ln -sf "${PROGRAM_PREFIX}cc" "$STAGE_DIR/bin/${PROGRAM_PREFIX}g++" &&
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131 ln -sf "${PROGRAM_PREFIX}cc" "$STAGE_DIR/bin/${PROGRAM_PREFIX}c++" &&
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132 ln -s c++ "$STAGE_DIR/tools/bin/raw++" || dienow
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133 fi
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134
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135 # Make sure "tools" has everything distccd needs.
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136
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137 cd "$STAGE_DIR/tools" || dienow
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138 ln -s cc "$STAGE_DIR/tools/bin/gcc" 2>/dev/null
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139 [ -z "$NO_CPLUSPLUS" ] && ln -s c++ "$STAGE_DIR/tools/bin/g++" 2>/dev/null
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140
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141 rm -rf "${STAGE_DIR}"/{lib/gcc,libexec/gcc/install-tools,bin/${ARCH}-unknown-*}
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142
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143 # Little dance so binary package tarball would be called "gcc", not "gcc-core".
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144 mv "$WORK"/{*gcc-core,gcc}
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145 PACKAGE=gcc cleanup build-gcc