[Buildroot] [PATCH 1/4] package/bind: enable static build

[Thomas Petazzoni]

Hello Fabrice,

On Tue, 23 Apr 2019 23:24:03 +0200
Fabrice Fontaine <fontaine.fabrice at gmail.com> wrote:

> Static build has been disabled in 2014 with commit
> 6045904752b06a8b8e52ba8fc2e49a8548964e8d however bind can be built
> statically thanks to --without-dlopen so enable it back
> 
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
> ---
>  ...n_driver.c-fix-build-without-dlfcn.h.patch | 28 +++++++++++++++++++
>  package/bind/Config.in                        |  5 ++--
>  package/bind/bind.mk                          |  4 ++-
>  3 files changed, 33 insertions(+), 4 deletions(-)
>  create mode 100644 package/bind/0002-dlz_open_driver.c-fix-build-without-dlfcn.h.patch

The series looks good in principle, but sadly the following defconfig:

BR2_arm=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/br-arm-full-2019.02-rc1.tar.bz2"
BR2_TOOLCHAIN_EXTERNAL_GCC_4_9=y
BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_14=y
BR2_TOOLCHAIN_EXTERNAL_LOCALE=y
# BR2_TOOLCHAIN_EXTERNAL_HAS_THREADS_DEBUG is not set
BR2_TOOLCHAIN_EXTERNAL_CXX=y
BR2_INIT_NONE=y
BR2_SYSTEM_BIN_SH_NONE=y
# BR2_PACKAGE_BUSYBOX is not set
BR2_PACKAGE_DHCP=y
# BR2_TARGET_ROOTFS_TAR is not set

fails to build with:

configure: error: Cannot find static libraries at /home/thomas/projets/buildroot/output/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib
make[1]: *** [package/pkg-generic.mk:231: /home/thomas/projets/buildroot/output/build/dhcp-4.4.1/.stamp_configured] Error 1

Looking at configure.ac sheds some light:

AC_ARG_ENABLE(libtool,
        AS_HELP_STRING([--enable-libtool],
[use GNU libtool for dynamic shared libraries (default is no).]),
        want_libtool="$enableval")

if test "$use_libbind" != "no"; then
        if test "$want_libtool" = "yes" -a \
                ! -f "$use_libbind/lib/libisc.la"
        then
                AC_MSG_ERROR([Cannot find dynamic libraries at $use_libbind/lib])
        fi
        if test "$want_libtool" = "no" -a \
                ! -f "$use_libbind/lib/libisc.a"
        then
                AC_MSG_ERROR([Cannot find static libraries at $use_libbind/lib])
        fi
fi

We are not passing --enable-libtool, so the code checks is libisc.a
exists, and it doesn't because a default build is BR2_SHARED_LIBS=y,
and therefore bind doesn't build/install any static library.

I suppose passing --enable-libtool would work, but I haven't tested.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com