scripts/build/companion_libs/libelf.sh
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Wed Dec 29 02:34:18 2010 +0100 (2010-12-29)
branch1.9
changeset 2256 004b41d847f8
parent 2216 81b4c0efa46f
child 2332 cc0587459152
permissions -rw-r--r--
complibs/libelf: build with -fPIC

libelf is used by gcc to build the lto-plugin used
by binutils' gold to perform LTO.

This requires that files in libelf be compiled with
-fPIC to generate a proper .so.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
(transplanted from c48aba92cbeb7b7dce956a63ec65d3296735cc16)
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# Build script for libelf
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do_libelf_get() { :; }
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do_libelf_extract() { :; }
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do_libelf() { :; }
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do_libelf_target() { :; }
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if [ "${CT_LIBELF}" = "y" -o "${CT_LIBELF_TARGET}" = "y" ]; then
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do_libelf_get() {
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    # The server hosting libelf will return an "HTTP 300 : Multiple Choices"
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    # error code if we try to download a file that does not exists there.
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    # So we have to request the file with an explicit extension.
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    CT_GetFile "libelf-${CT_LIBELF_VERSION}" .tar.gz http://www.mr511.de/software/
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}
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do_libelf_extract() {
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    CT_Extract "libelf-${CT_LIBELF_VERSION}"
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    CT_Patch "libelf" "${CT_LIBELF_VERSION}"
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}
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if [ "${CT_LIBELF}" = "y" ]; then
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do_libelf() {
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    local -a libelf_opts
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    CT_DoStep INFO "Installing libelf"
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    mkdir -p "${CT_BUILD_DIR}/build-libelf"
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    CT_Pushd "${CT_BUILD_DIR}/build-libelf"
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    CT_DoLog EXTRA "Configuring libelf"
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    if [ "${CT_COMPLIBS_SHARED}" = "y" ]; then
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        libelf_opts+=( --enable-shared --disable-static )
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    else
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        libelf_opts+=( --disable-shared --enable-static )
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    fi
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    CC="${CT_HOST}-gcc"                                     \
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    CFLAGS="-fPIC"                                          \
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    CT_DoExecLog CFG                                        \
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    "${CT_SRC_DIR}/libelf-${CT_LIBELF_VERSION}/configure"   \
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        --build=${CT_BUILD}                                 \
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        --host=${CT_HOST}                                   \
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        --target=${CT_TARGET}                               \
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        --prefix="${CT_COMPLIBS_DIR}"                       \
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        --enable-compat                                     \
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        --enable-elf64                                      \
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        --enable-extended-format                            \
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        "${libelf_opts[@]}"
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    CT_DoLog EXTRA "Building libelf"
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    CT_DoExecLog ALL make
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    CT_DoLog EXTRA "Installing libelf"
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    CT_DoExecLog ALL make install
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    CT_Popd
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    CT_EndStep
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}
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fi # CT_LIBELF
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if [ "${CT_LIBELF_TARGET}" = "y" ]; then
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do_libelf_target() {
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    CT_DoStep INFO "Installing libelf for the target"
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    mkdir -p "${CT_BUILD_DIR}/build-libelf-for-target"
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    CT_Pushd "${CT_BUILD_DIR}/build-libelf-for-target"
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    CT_DoLog EXTRA "Configuring libelf"
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    CC="${CT_TARGET}-gcc"                                   \
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    CFLAGS="-fPIC"                                          \
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    CT_DoExecLog ALL                                        \
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    "${CT_SRC_DIR}/libelf-${CT_LIBELF_VERSION}/configure"   \
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        --build=${CT_BUILD}                                 \
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        --host=${CT_TARGET}                                 \
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        --target=${CT_TARGET}                               \
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        --prefix=/usr                                       \
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        --enable-compat                                     \
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        --enable-elf64                                      \
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        --enable-shared                                     \
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        --enable-extended-format                            \
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        --enable-static
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    CT_DoLog EXTRA "Building libelf"
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    CT_DoExecLog ALL make
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    CT_DoLog EXTRA "Installing libelf"
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    CT_DoExecLog ALL make instroot="${CT_SYSROOT_DIR}" install
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    CT_Popd
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    CT_EndStep
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}
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fi # CT_LIBELF_TARGET
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fi # CT_LIBELF || CT_LIBELF_TARGET