compilation error

[tarpauwatratar]

Hi everyone,

I was unable to compile the newest dev version of harbour from sources on my (uname --all):

Linux eLama 5.8.7-arch1-1 #1 SMP PREEMPT Sat, 05 Sep 2020 12:31:32 +0000 x86_64 GNU/Linux

I was forced to modify the src/rtl/arc4.c:

diff --git a/src/rtl/arc4.c b/src/rtl/arc4.c

index 1c00f2a575..acee0bedfe 100644

--- a/src/rtl/arc4.c

+++ b/src/rtl/arc4.c

@@ -56,7 +56,6 @@

     * look for it only with "classic" line of libc's.

     */

 #  if ( ! defined( HB_OS_LINUX ) || ( defined( __GLIBC__ ) || defined( __UCLIBC__ ) ) )

-#     define HAVE_SYS_SYSCTL_H

 #  endif

 #  define HAVE_DECL_CTL_KERN

 #  define HAVE_DECL_KERN_RANDOM

Without this modification a compilation process ends on the following error message:

gcc  -I. -I../../../../../include -W -Wall -O3 -DHB_HAS_PCRE -I/usr/include -DHB_HAS_ZLIB -I/usr/include  -oarc4.o  -c ../../../arc4.c

../../../arc4.c:81:15: fatal error: sys/sysctl.h: No such file or directory

   81 | #     include <sys/sysctl.h>

      |               ^~~~~~~~~~~~~~

compilation terminated.

This modification is ugly but it works - I was able to compile hello.prg and dbu files. 

I was also unable to use my old version of harbour which was compiled about one year ago. I don't remember the error message but it was related to the sysctl and lacking function. In the arc4.c I've found:

   /*

    * sysctl() on Linux has fallen into depreciation. Newer generations

    * of runtime C libraries, like musl, doesn't even expose it. Here we

    * look for it only with "classic" line of libc's.

    */

So IMO You know what is wrong and how to repair it better than me ;) 

[Aleksander Czajczynski]

Hi!

glibc >= 2.30 now removed what musl predicted, i have finally added some
more brackets to the repo to detect this.
https://github.com/harbour/core/commit/492ae2a79b1a3a95191ac1993b3251180618187c

Best regards, Aleksander

tarpauwatratar wrote:
>
> I was unable to compile the newest dev version of harbour from sources
> on my (uname --all):
>
> Linux eLama 5.8.7-arch1-1 #1 SMP PREEMPT Sat, 05 Sep 2020 12:31:32
> +0000 x86_64 GNU/Linux
>
> I was forced to modify the src/rtl/arc4.c:

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