configure.ac_linux中configure报错_configure prefix(2)

从66到108行，测试build，host，target系统（这些命令在acx.m4中定义），测试install，ln，sed，awk。

3、确定哪些库和工具将被配置

# these library is used by various programs built for the build
# environment
#
build_libs="build-libiberty"

# these tools are built for the build environment
build_tools="build-texinfo build-flex build-bison build-m4 build-fixincludes"

# these libraries are used by various programs built for the host environment
#
host_libs="intl libiberty opcodes bfd readline tcl tk itcl libgui zlib libcpp libdecnumber gmp mpfr mpc isl cloog libelf libiconv"

# these tools are built for the host environment
# Note, the powerpc-eabi build depends on sim occurring before gdb in order to
# know that we are building the simulator.
# binutils, gas and ld appear in that order because it makes sense to run
# "make check" in that particular order.
# If --enable-gold is used, "gold" may replace "ld".
host_tools="texinfo flex bison binutils gas ld fixincludes gcc cgen sid sim gdb gprof etc expect dejagnu m4 utils guile fastjar gnattools"

# libgcj represents the runtime libraries only used by gcj.
libgcj="target-libffi \
        target-zlib \
        target-libjava"

# these libraries are built for the target environment, and are built after
# the host libraries and the host tools (which may be a cross compiler)
# Note that libiberty is not a target library.
target_libraries="target-libgcc \
                target-libgloss \
                target-newlib \
                target-libgomp \
                target-libatomic \
                target-libitm \
                target-libstdc++-v3 \
                target-libmudflap \
                target-libssp \
                target-libquadmath \
                target-libgfortran \
                target-boehm-gc \
                ${libgcj} \
                target-libobjc \
                target-libada \
                target-libgo"

# these tools are built using the target libraries, and are intended to
# run only in the target environment
#
# note: any program that *uses* libraries that are in the "target_libraries"
# list belongs in this list.
#
target_tools="target-rda"

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