Compilation error: missing `xlocale.h`

[cogumbreiro]

Hi, everyone,

I'm having problems compiling hclib in Ubuntu 17.10. According to ubuntu-packages it seemed I had to install libc++-dev. The file is indeed installed in my system but hclib's build script is not able to find it:

$ find /usr/include/ -iname 'xlocale.h'
/usr/include/c++/v1/support/solaris/xlocale.h
/usr/include/c++/v1/support/newlib/xlocale.h
/usr/include/c++/v1/support/ibm/xlocale.h
/usr/include/c++/v1/support/musl/xlocale.h
/usr/include/c++/v1/support/xlocale/xlocale.h

Any workarounds? I was expecting configure.sh to either find the right header or at least consider the missing header as an error.

---

Compilation error:

$ ./install.sh
[...]
/bin/bash ../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I../../src -I../inc    -Wall -g -O3 -std=c11 -I../../inc -I../../src/inc -I../../src/fcontext  -DHC_ASSERTION_CHECK -DHC_COMM_WORKER_STATS -I/usr/include/libxml2 -Wall -g -O3 -std=c11 -MT libhclib_la-hclib-thread-bind.lo -MD -MP -MF .deps/libhclib_la-hclib-thread-bind.Tpo -c -o libhclib_la-hclib-thread-bind.lo `test -f 'hclib-thread-bind.c' || echo '../../src/'`hclib-thread-bind.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../../src -I../inc -Wall -g -O3 -std=c11 -I../../inc -I../../src/inc -I../../src/fcontext -DHC_ASSERTION_CHECK -DHC_COMM_WORKER_STATS -I/usr/include/libxml2 -Wall -g -O3 -std=c11 -MT libhclib_la-hclib-thread-bind.lo -MD -MP -MF .deps/libhclib_la-hclib-thread-bind.Tpo -c ../../src/hclib-thread-bind.c  -fPIC -DPIC -o .libs/libhclib_la-hclib-thread-bind.o
../../src/hclib-thread-bind.c:20:10: fatal error: xlocale.h: No such file or directory
 #include <xlocale.h>
          ^~~~~~~~~~~
compilation terminated.
Makefile:695: recipe for target 'libhclib_la-hclib-thread-bind.lo' failed
make[2]: *** [libhclib_la-hclib-thread-bind.lo] Error 1
make[2]: Leaving directory '/tmp/hclib/compileTree/src'
Makefile:770: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/tmp/hclib/compileTree/src'
Makefile:478: recipe for target 'all-recursive' failed
make: *** [all-recursive] Error 1

[cogumbreiro]

I think the following link is related to this issue: xlocal.h is removed of glibc as of 2.26.

Edit: This thread discusses the issue and a workaround required to build LLVM.

[cogumbreiro]

Hard-coding the include path to any directory in /usr/include/c++/v1/support/* results in the following error:

In file included from /usr/include/sched.h:34:0,
                 from hclib-thread-bind.c:22:
/usr/include/time.h:113:5: error: unknown type name ‘locale_t’; did you mean ‘clock_t’?
     locale_t __loc) __THROW;
     ^~~~~~~~
     clock_t

I also tried following the suggestion of including locale.h rather than xlocale.h and obtained the same compiler error above.

[ahayashi]

Hello,

Can you try the code below? This would be just a quick fix and might not be a complete solution. But I confirmed the fix worked at least on my Ubuntu 17.10 machine and the C tests passed. I'll dive into more details, but please let me know if the fix works on your machine.

My changes include:

1. Use locale.h instead of xlocale.h as you mentioned.
2. Place #include<locale.h> before #define _GNU_SOURCE
3. Add #include<time.h> immediately after #include<locale.h>

It seems that the locale_t error you mentioned was caused by using GNU Extensions (#define _GNU_SOURCE and __USE_GNU).

#include <stdio.h>
#include <locale.h>
#include <time.h>
#define _GNU_SOURCE
#define __USE_GNU
#include <xlocale.h>
#include <unistd.h>
#include <sched.h>
#include <errno.h>

[cogumbreiro]

@ahayashi, with your changes I don't think we need to include xlocale.h. Here's the full patch below that allowed it to compile in my system:

@@ -15,9 +15,10 @@
  */

 #include <stdio.h>
+#include <locale.h>
+#include <time.h>
 #define _GNU_SOURCE
 #define __USE_GNU
-#include <xlocale.h>
 #include <unistd.h>
 #include <sched.h>
 #include <errno.h>

[ahayashi]

@cogumbreiro, oh right, I forgot to delete #include<xlocale.h>. Yes, the full patch was what I meant.