[Buildroot] [PATCH] clapack: musl patches

[Yann E. MORIN]

Alex, All,

On 2015-08-15 19:15 +0300, Alex Suykov spake thusly:
> Fixes
> http://autobuild.buildroot.net/results/a94f097193cd5444dee5cd9df9d544ce736a7e7e/
> http://autobuild.buildroot.net/results/036014e492f7caf793b92a9822ab6a0b1a54f2e8/

Funny! I was looking at the same build failures, and was leaning toward
making clapack depend on !musl...

> Signed-off-by: Alex Suykov <alex.suykov at gmail.com>
> ---
>  package/clapack/0006-remove-uninit-f2c.patch | 24 ++++++++++++++++++++++++
>  package/clapack/0007-off64-t.patch           | 16 ++++++++++++++++
>  2 files changed, 40 insertions(+)
>  create mode 100644 package/clapack/0006-remove-uninit-f2c.patch
>  create mode 100644 package/clapack/0007-off64-t.patch
> 
> diff --git a/package/clapack/0006-remove-uninit-f2c.patch b/package/clapack/0006-remove-uninit-f2c.patch
> new file mode 100644
> index 0000000..251c702
> --- /dev/null
> +++ b/package/clapack/0006-remove-uninit-f2c.patch
> @@ -0,0 +1,24 @@
> +uninit.c includes glibc-specific <fpu_control.h> not provided by musl.
> +Somewhat portable replacement is <fenv.h>, which is available in musl
> +but requires non-trivial changes to uninit.c.
> +
> +f2c uses _uninit_f2c() from uninit.c to implement its -trapuv option,
> +pre-initializiing floating-point variables to NaN and asking FPU to send
> +SIGFPE whenever NaN value is encountered.
> +
> +clapack source has already been run through f2c without -trapuv,
> +so uninit.c code is not used anywhere and can be safely excluded.

Indeed, I could not see any call to _uninit_f2c in any of clapack's own
source code, neither did I in any of the two users of clapack we have in
Buildroot, armadillo and python-numpy.

Googling around only gives references to uninit's own source code (and
this mail of yours, already indexed by Google; scary, isn't it?).

So, it indeed looks sane to remove it entirely...

Reviewed-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>

This means I'm now trashing my local patches; thanks! ;-)

Regards,
Yann E. MORIN.

> +Signed-off-by: Alex Suykov <alex.suykov at gmail.com>
> +
> +--- a/F2CLIBS/libf2c/CMakeLists.txt
> ++++ b/F2CLIBS/libf2c/CMakeLists.txt
> +@@ -1,7 +1,7 @@
> + set(MISC 
> +   f77vers.c i77vers.c main.c s_rnge.c abort_.c exit_.c getarg_.c iargc_.c
> +   getenv_.c signal_.c s_stop.c s_paus.c system_.c cabs.c ctype.c
> +-  derf_.c derfc_.c erf_.c erfc_.c sig_die.c uninit.c)
> ++  derf_.c derfc_.c erf_.c erfc_.c sig_die.c)
> + set(POW pow_ci.c pow_dd.c pow_di.c pow_hh.c pow_ii.c pow_ri.c pow_zi.c pow_zz.c)
> + set(CX 	c_abs.c c_cos.c c_div.c c_exp.c c_log.c c_sin.c c_sqrt.c)
> + set(DCX	z_abs.c z_cos.c z_div.c z_exp.c z_log.c z_sin.c z_sqrt.c)
> diff --git a/package/clapack/0007-off64-t.patch b/package/clapack/0007-off64-t.patch
> new file mode 100644
> index 0000000..bf66d3c
> --- /dev/null
> +++ b/package/clapack/0007-off64-t.patch
> @@ -0,0 +1,16 @@
> +musl only provides off64_t, not __off64_t.
> +glibc and uclibc have both defined.
> +
> +Signed-off-by: Alex Suykov <alex.suykov at gmail.com>
> +
> +--- a/F2CLIBS/libf2c/sysdep1.h
> ++++ b/F2CLIBS/libf2c/sysdep1.h
> +@@ -10,7 +10,7 @@
> + 
> + #ifdef __linux__
> + #define USE_LARGEFILE
> +-#define OFF_T __off64_t
> ++#define OFF_T off64_t
> + #endif
> + 
> + #ifdef _AIX43
> -- 
> 2.0.3
> 
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