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scripts/build/companion_libs/libelf.sh
author Michael Hope <michael.hope@linaro.org>
Thu Sep 29 12:40:42 2011 +1300 (2011-09-29)
changeset 2695 f2495884ca3e
parent 2381 0ca0f85a4b2a
child 2905 286b2937c101
permissions -rw-r--r--
config: add a 'auto' value for the number of parallel jobs

When CT_PARALLEL_JOBS is -1, set the number of parallel jobs to the
number of online CPUs + 1. Update documentation to match.

I find this useful when building in the cloud. You can use the same
.config file and have the build adapt to the number of processors
available. Limited testing shows that NCPUS+1 is faster than NCPUS+0
or NCPUS+2.

Signed-off-by: Michael Hope <michael.hope@linaro.org> 
     1 # Build script for libelf

     2 

     3 do_libelf_get() { :; }

     4 do_libelf_extract() { :; }

     5 do_libelf() { :; }

     6 do_libelf_target() { :; }

     7 

     8 if [ "${CT_LIBELF}" = "y" -o "${CT_LIBELF_TARGET}" = "y" ]; then

     9 

    10 do_libelf_get() {

    11     # The server hosting libelf will return an "HTTP 300 : Multiple Choices"

    12     # error code if we try to download a file that does not exists there.

    13     # So we have to request the file with an explicit extension.

    14     CT_GetFile "libelf-${CT_LIBELF_VERSION}" .tar.gz http://www.mr511.de/software/

    15 }

    16 

    17 do_libelf_extract() {

    18     CT_Extract "libelf-${CT_LIBELF_VERSION}"

    19     CT_Patch "libelf" "${CT_LIBELF_VERSION}"

    20 }

    21 

    22 if [ "${CT_LIBELF}" = "y" ]; then

    23 

    24 do_libelf() {

    25     CT_DoStep INFO "Installing libelf"

    26     mkdir -p "${CT_BUILD_DIR}/build-libelf"

    27     CT_Pushd "${CT_BUILD_DIR}/build-libelf"

    28 

    29     CT_DoLog EXTRA "Configuring libelf"

    30 

    31     CT_DoExecLog CFG                                        \

    32     CC="${CT_HOST}-gcc"                                     \

    33     CFLAGS="-fPIC"                                          \

    34     "${CT_SRC_DIR}/libelf-${CT_LIBELF_VERSION}/configure"   \

    35         --build=${CT_BUILD}                                 \

    36         --host=${CT_HOST}                                   \

    37         --target=${CT_TARGET}                               \

    38         --prefix="${CT_COMPLIBS_DIR}"                       \

    39         --enable-compat                                     \

    40         --enable-elf64                                      \

    41         --enable-extended-format                            \

    42         --disable-shared                                    \

    43         --enable-static

    44 

    45     CT_DoLog EXTRA "Building libelf"

    46     CT_DoExecLog ALL make

    47 

    48     CT_DoLog EXTRA "Installing libelf"

    49     CT_DoExecLog ALL make install

    50 

    51     CT_Popd

    52     CT_EndStep

    53 }

    54 

    55 fi # CT_LIBELF

    56 

    57 if [ "${CT_LIBELF_TARGET}" = "y" ]; then

    58 

    59 do_libelf_target() {

    60     CT_DoStep INFO "Installing libelf for the target"

    61     mkdir -p "${CT_BUILD_DIR}/build-libelf-for-target"

    62     CT_Pushd "${CT_BUILD_DIR}/build-libelf-for-target"

    63 

    64     CT_DoLog EXTRA "Configuring libelf"

    65     CT_DoExecLog CFG                                        \

    66     CC="${CT_TARGET}-gcc"                                   \

    67     CFLAGS="-fPIC"                                          \

    68     RANLIB="${CT_TARGET}-ranlib"                            \

    69     "${CT_SRC_DIR}/libelf-${CT_LIBELF_VERSION}/configure"   \

    70         --build=${CT_BUILD}                                 \

    71         --host=${CT_TARGET}                                 \

    72         --target=${CT_TARGET}                               \

    73         --prefix=/usr                                       \

    74         --enable-compat                                     \

    75         --enable-elf64                                      \

    76         --enable-shared                                     \

    77         --enable-extended-format                            \

    78         --enable-static

    79 

    80     CT_DoLog EXTRA "Building libelf"

    81     CT_DoExecLog ALL make

    82 

    83     CT_DoLog EXTRA "Installing libelf"

    84     CT_DoExecLog ALL make instroot="${CT_SYSROOT_DIR}" install

    85 

    86     CT_Popd

    87     CT_EndStep

    88 }

    89 

    90 fi # CT_LIBELF_TARGET

    91 

    92 fi # CT_LIBELF || CT_LIBELF_TARGET
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