proot: unbreak musl

This makes proot build on musl, but requires testing to make
sure the resulting binary works as expected.

srcpkgs/proot/files/ptrace_compat.h

@@ -0,0 +1,80 @@
+#if !defined(_PTRACE_COMPAT_H_)
+#define	_PTRACE_COMPAT_H_
+
+
+/* Type of the REQUEST argument to `ptrace.'  */
+enum __ptrace_request
+{
+  __PTRACE_TRACEME = 0,
+  __PTRACE_PEEKTEXT = 1,
+  __PTRACE_PEEKDATA = 2,
+  __PTRACE_PEEKUSER = 3,
+  __PTRACE_POKETEXT = 4,
+  __PTRACE_POKEDATA = 5,
+  __PTRACE_POKEUSER = 6,
+  __PTRACE_CONT = 7,
+  __PTRACE_KILL = 8,
+  __PTRACE_SINGLESTEP = 9,
+  __PTRACE_GETREGS = 12,
+  __PTRACE_SETREGS = 13,
+  __PTRACE_GETFPREGS = 14,
+  __PTRACE_SETFPREGS = 15,
+  __PTRACE_ATTACH = 16,
+  __PTRACE_DETACH = 17,
+  __PTRACE_GETFPXREGS = 18,
+  __PTRACE_SETFPXREGS = 19,
+  __PTRACE_SYSCALL = 24,
+  __PTRACE_SETOPTIONS = 0x4200,
+  __PTRACE_GETEVENTMSG = 0x4201,
+  __PTRACE_GETSIGINFO = 0x4202,
+  __PTRACE_SETSIGINFO = 0x4203,
+  __PTRACE_GETREGSET = 0x4204,
+  __PTRACE_SETREGSET = 0x4205,
+  __PTRACE_SEIZE = 0x4206,
+  __PTRACE_INTERRUPT = 0x4207,
+  __PTRACE_LISTEN = 0x4208,
+  __PTRACE_PEEKSIGINFO = 0x4209,
+  __PTRACE_GETSIGMASK = 0x420a,
+  __PTRACE_SETSIGMASK = 0x420b
+};
+
+
+/* Flag for PTRACE_LISTEN.  */
+enum __ptrace_flags
+{
+  __PTRACE_SEIZE_DEVEL = 0x80000000
+};
+
+/* Options set using PTRACE_SETOPTIONS.  */
+enum __ptrace_setoptions
+{
+  __PTRACE_O_TRACESYSGOOD	= (1 << 0),
+  __PTRACE_O_TRACEFORK		= (1 << 1),
+  __PTRACE_O_TRACEVFORK		= (1 << 2),
+  __PTRACE_O_TRACECLONE		= (1 << 3),
+  __PTRACE_O_TRACEEXEC		= (1 << 4),
+  __PTRACE_O_TRACEVFORKDONE	= (1 << 5),
+  __PTRACE_O_TRACEEXIT		= (1 << 6),
+  __PTRACE_O_TRACESECCOMP	= (1 << 7),
+  __PTRACE_O_EXITKILL		= (1 << 20),
+  __PTRACE_O_MASK		= __PTRACE_O_EXITKILL | ((1 << 8) - 1)
+};
+
+/* Wait extended result codes for the above trace options.  */
+enum __ptrace_eventcodes
+{
+  __PTRACE_EVENT_FORK	= 1,
+  __PTRACE_EVENT_VFORK	= 2,
+  __PTRACE_EVENT_CLONE	= 3,
+  __PTRACE_EVENT_EXEC	= 4,
+  __PTRACE_EVENT_VFORK_DONE = 5,
+  __PTRACE_EVENT_EXIT	= 6,
+  __PTRACE_EVENT_SECCOMP  = 7
+};
+
+enum __ptrace_peeksiginfo_flags
+{
+  __PTRACE_PEEKSIGINFO_SHARED = (1 << 0)
+};
+
+#endif /* _PTRACE_COMPAT_H */

srcpkgs/proot/patches/linux_wait_h.patch

@@ -0,0 +1,34 @@
+--- src/ptrace/ptrace.c	2014-12-15 15:18:11.000000000 +0100
++++ src/ptrace/ptrace.c	2015-07-12 13:13:45.970093333 +0200
+@@ -28,6 +28,7 @@
+ #include <sys/uio.h>    /* struct iovec, */
+ #include <sys/param.h>  /* MIN(), MAX(), */
+ #include <string.h>     /* memcpy(3), */
++#include <linux/wait.h> /* __WALL, __WCLONE */
+ 
+ #include "ptrace/ptrace.h"
+ #include "ptrace/user.h"
+--- src/ptrace/wait.c	2014-12-15 15:18:11.000000000 +0100
++++ src/ptrace/wait.c	2015-07-12 13:16:41.930106019 +0200
+@@ -26,6 +26,7 @@
+ #include <stdbool.h>    /* bool, true, false, */
+ #include <signal.h>     /* SIG*, */
+ #include <talloc.h>     /* talloc*, */
++#include <linux/wait.h> /* __WALL, __WCLONE */
+ 
+ #include "ptrace/wait.h"
+ #include "ptrace/ptrace.h"
+--- src/tracee/tracee.c	2014-12-15 15:18:11.000000000 +0100
++++ src/tracee/tracee.c	2015-07-12 13:20:01.058120375 +0200
+@@ -31,6 +31,11 @@
+ #include <signal.h>     /* kill(2), SIGKILL, */
+ #include <sys/ptrace.h> /* ptrace(2), PTRACE_*, */
+ #include <errno.h>      /* E*, */
++#include <linux/wait.h> /* __WALL, __WCLONE */
++
++#if !defined(__W_STOPCODE)
++#define __W_STOPCODE(sig) ((sig) << 8 | 0x7f)
++#endif
+ 
+ #include "tracee/tracee.h"
+ #include "tracee/reg.h"

srcpkgs/proot/patches/musl_execinfo.patch

@@ -0,0 +1,28 @@
+--- src/cli/cli.c	2014-12-15 15:18:11.000000000 +0100
++++ src/cli/cli.c	2015-07-12 13:18:46.548115003 +0200
+@@ -30,7 +30,9 @@
+ #include <sys/types.h>     /* getpid(2),  */
+ #include <unistd.h>        /* getpid(2),  */
+ #include <errno.h>         /* errno(3), */
++#if defined(__GLIBC__)
+ #include <execinfo.h>      /* backtrace_symbols(3), */
++#endif
+ #include <limits.h>        /* INT_MAX, */
+ 
+ #include "cli/cli.h"
+@@ -555,6 +557,7 @@
+ void __cyg_profile_func_enter(void *this_function, void *call_site) DONT_INSTRUMENT;
+ void __cyg_profile_func_enter(void *this_function, void *call_site)
+ {
++#if defined(__GLIBC__)
+ 	void *const pointers[] = { this_function, call_site };
+ 	char **symbols = NULL;
+ 
+@@ -567,6 +570,7 @@
+ end:
+ 	if (symbols != NULL)
+ 		free(symbols);
++#endif /* defined(__GLIBC__) */
+ 
+ 	if (indent_level < INT_MAX)
+ 		indent_level++;

srcpkgs/proot/patches/ptrace_compat.patch

@@ -0,0 +1,12 @@
+--- src/tracee/tracee.h	2014-12-15 15:18:11.000000000 +0100
++++ src/tracee/tracee.h	2015-07-12 13:12:10.726086466 +0200
+@@ -28,6 +28,9 @@
+ #include <stdbool.h>   /* bool,  */
+ #include <sys/queue.h> /* LIST_*, */
+ #include <sys/ptrace.h>/* enum __ptrace_request */
++#if !defined(__GLIBC__)
++#include "ptrace_compat.h"
++#endif
+ #include <talloc.h>    /* talloc_*, */
+ 
+ #include "arch.h" /* word_t, user_regs_struct, */

srcpkgs/proot/template

@@ -1,7 +1,7 @@
 # Template file for 'proot'
 pkgname=proot
 version=5.1.0
-revision=1
+revision=2
 wrksrc="PRoot-${version}"
 makedepends="libarchive-devel talloc-devel"
 short_desc="User-space implementation of chroot, mount --bind, and binfmt_misc"
@@ -15,6 +15,10 @@ pre_build() {
 	sed -i "s,strip,:,g" src/GNUmakefile
 	sed -i "s,objcopy,${OBJCOPY},g" src/GNUmakefile
 	sed -i "s,objdump,${OBJDUMP},g" src/GNUmakefile
+	sed -i "s,--input ,--input-target ,g" src/GNUmakefile
+	sed -i "s,--output ,--output-target ,g" src/GNUmakefile
+	# Fix glibc ptrace.h specific constants for musl libc
+	cp ${FILESDIR}/ptrace_compat.h ${wrksrc}/src
 }
 do_build() {
 	cd src