main/libbsd: enable build on ppc64le

Libbsd includes a.out.h header to get some definitions, like struct nlist,
struct exec.
In Alpine x86_64 this header is provided by linux-headers package (linux/a.out.h),
in Ubuntu ppc64le it is provided by glibc (a.out.h), but in Alpine ppc64le it is not
available.

A workaround for this problem is to define the types that are being used
by libbsd instead of including the invalid header for ppc64le.

1 files changed, 60 insertions, 0 deletions

diff --git a/main/libbsd/fix-build-with-musl-on-ppc64le.patch b/main/libbsd/fix-build-with-musl-on-ppc64le.patch
new file mode 100644
index 0000000000..0385f38175
--- /dev/null
+++ b/main/libbsd/fix-build-with-musl-on-ppc64le.patch
@@ -0,0 +1,60 @@
+Libbsd includes a.out.h header to get some definitions like struct nlist, struct exec.
+
+In Alpine x86_64 this header is provided by linux-headers package (linux/a.out.h),
+in Ubuntu ppc64le it is provided by glibc (a.out.h), but in Alpine ppc64le it is not
+available.
+
+A workaround for this problem is to define the types that are being used
+by libbsd instead of including the invalid header for ppc64le.
+===
+--- libbsd-0.8.3.orig/src/nlist.c
++++ libbsd-0.8.3/src/nlist.c
+@@ -40,7 +40,48 @@
+
+ #include <errno.h>
+ #include <fcntl.h>
++
++#ifndef __powerpc64__
+ #include <linux/a.out.h>
++#else
++// Copied from a.out.h, because it is not available on ppc64le with musl
++struct nlist
++{
++  union
++     {
++	char *n_name;
++	struct nlist *n_next;
++	long n_strx;
++     } n_un;
++    unsigned char n_type;
++    char n_other;
++    short n_desc;
++    unsigned long n_value;
++};
++
++struct exec
++{
++  unsigned long a_info; /* Use macros N_MAGIC, etc for access.  */
++  unsigned int a_text;  /* Length of text, in bytes.  */
++  unsigned int a_data;  /* Length of data, in bytes.  */
++  unsigned int a_bss;   /* Length of uninitialized data area for file, in bytes.  */
++  unsigned int a_syms;  /* Length of symbol table data in file, in bytes.  */
++  unsigned int a_entry; /* Start address.  */
++  unsigned int a_trsize;/* Length of relocation info for text, in bytes.  */
++  unsigned int a_drsize;/* Length of relocation info for data, in bytes.  */
++};
++
++#define N_UNDF  0
++#define N_ABS   2
++#define N_TEXT  4
++#define N_DATA  6
++#define N_BSS   8
++#define N_FN    15
++#define N_EXT   1
++#define N_STAB  0340
++
++#endif
++
+ #include <stdio.h>
+ #include <string.h>
+ #include <unistd.h>