[PATCH] Document and fix --enable-bind-now [BZ #21015]

[Florian Weimer]

On 01/04/2017 06:52 PM, Florian Weimer wrote:
> On 01/02/2017 07:46 PM, Florian Weimer wrote:
>> 2017-01-02  Florian Weimer  <fweimer@redhat.com>
>>
>>     [BZ #21015]
>>     * manual/install.texi (Configuring and compiling): Document
>>     --enable-bind-now.
>>     * Makeconfig [bind-now] (LDFLAGS-lib.so): Set.
>>     (build-shlib-helper): Use $(LDFLAGS-lib.so).
>>     (format.lds): Likewise.
>>     [bind-now] (LDFLAGS-c.so): Remove.
>>     * sysdeps/x86_64/localplt.data (libm.so): matherr relocation can
>>     be R_X86_64_GLOB_DAT.
>>     * sysdeps/unix/sysv/linux/i386/localplt.data (libm.so): matherr
>>     relocation can be R_386_GLOB_DAT.
>>     * sysdeps/unix/sysv/linux/alpha/localplt.data (libm.so): matherr
>>     relocaiton can be R_ALPHA_GLOB_DAT.
>
> The patch is incomplete because it does not cover gconv modules, which
> are compiled as, well, modules (just like the test DSOs in elf/).
>
> This patch on top fixes that omission (hopefully it's not garbled too
> much):
>
> diff --git a/iconvdata/Makefile b/iconvdata/Makefile
> index 04157b2..eb744da 100644
> --- a/iconvdata/Makefile
> +++ b/iconvdata/Makefile
> @@ -63,6 +63,10 @@ modules      := ISO8859-1 ISO8859-2 ISO8859-3
> ISO8859-4 ISO8859-5             \
>            MAC-CENTRALEUROPE KOI8-RU ISO8859-9E                          \
>            CP770 CP771 CP772 CP773 CP774
>
> +ifeq ($(bind-now),yes)
> +LDFLAGS.so += -Wl,-z,now
> +endif
> +
>  modules.so := $(addsuffix .so, $(modules))
>
>  ifeq (yes,$(build-shared))
>
> But I wonder if it's the right approach.  I don't think it's worth
> adding another kind of module just for this feature.

Ping?

Original patch is here:

  https://sourceware.org/ml/libc-alpha/2017-01/msg00060.html

Thanks,
Florian