fatal error: pthread.h: No such file or directory

["Moore, Richard F." <rfm6@leicester.ac.uk>]

Hi Yann,

Pulling latest git, I make, then do this to use built in recipe

./ct-ng x86_64-unknown-linux-uclibc

Everything builds fine.


If I do the same but only change (via ct-ng menuconfig) the target to
be 32 bit rather than 64 bit I get this on pass-2;


[INFO ]  Installing C library headers: done in 6.68s (at 08:20)
[INFO ] 
 =================================================================
[INFO ]  Installing pass-2 core C gcc compiler
[EXTRA]    Configuring core C gcc compiler
[EXTRA]    Building gcc
[ERROR]    /media/3/cyclone/crosstool-ng/.build/src/gcc
-5.3.0/libgcc/generic-morestack-thread.c:41:21: fatal error: pthread.h:
No such file or directory
[ERROR]    make[2]: *** [generic-morestack-thread.o] Error 1
[ERROR]    make[1]: *** [all-target-libgcc] Error 2
[ERROR]   
[ERROR]  >>
[ERROR]  >>  Build failed in step 'Installing pass-2 core C gcc
compiler'
[ERROR]  >>        called in step '(top-level)'
[ERROR]  >>
[ERROR]  >>  Error happened in: CT_DoExecLog[scripts/functions@259]
[ERROR]  >>        called from: do_gcc_core_backend[
scripts/build/cc/100-gcc.sh@520]
[ERROR]  >>        called from: do_gcc_core_pass_2[
scripts/build/cc/100-gcc.sh@154]
[ERROR]  >>        called from: do_cc_core_pass_2[
scripts/build/cc.sh@42]
[ERROR]  >>        called from: main[scripts/crosstool-NG.sh@650]
[ERROR]  >>
[ERROR]  >>  For more info on this error, look at the file: 'build.log'
[ERROR]  >>  There is a list of known issues, some with workarounds,
in:
[ERROR]  >>      'share/doc/crosstool-ng/crosstool-ng-1.22.0-126
-gd7339f5/B - Known issues.txt'
[ERROR]   
[ERROR]  (elapsed: 12:13.06)
[12:13] / ct-ng:152: recipe for target 'build' failed
make: *** [build] Error 2


I have tried altering various versions of build tools and it is always
the same error.
(I tried attaching build.log but it just bounced so resending without)


Cheers

Rich