Merge pull request #563 from stilor/musl-mips-refix

Add a workaround for musl in build scripts

4 files changed, 27 insertions, 67 deletions

diff --git a/patches/strace/4.15/020-use-asm-sgidefs.h.patch b/patches/strace/4.15/020-use-asm-sgidefs.h.patch
deleted file mode 100644
index 06ae5a3..0000000
--- a/patches/strace/4.15/020-use-asm-sgidefs.h.patch
+++ /dev/null
@@ -1,67 +0,0 @@
-diff -urpN strace-4.15.orig/configure strace-4.15/configure
---- strace-4.15.orig/configure	2016-12-14 01:17:44.000000000 -0800
-+++ strace-4.15/configure	2017-01-19 22:32:20.167896014 -0800
-@@ -8775,7 +8775,7 @@ $as_echo_n "checking for _MIPS_SIM... "
- if ${st_cv__MIPS_SIM+:} false; then :
-   $as_echo_n "(cached) " >&6
- else
--  if ac_fn_c_compute_int "$LINENO" "_MIPS_SIM" "st_cv__MIPS_SIM"        "#include <sgidefs.h>"; then :
-+  if ac_fn_c_compute_int "$LINENO" "_MIPS_SIM" "st_cv__MIPS_SIM"        "#include <asm/sgidefs.h>"; then :
- 
- else
-   as_fn_error $? "_MIPS_SIM cannot be determined" "$LINENO" 5
-@@ -8792,7 +8792,7 @@ if ${st_cv_mips_abi+:} false; then :
- else
-   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
- /* end confdefs.h.  */
--#include <sgidefs.h>
-+#include <asm/sgidefs.h>
- int
- main ()
- {
-@@ -8806,7 +8806,7 @@ if ac_fn_c_try_compile "$LINENO"; then :
- else
-   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
- /* end confdefs.h.  */
--#include <sgidefs.h>
-+#include <asm/sgidefs.h>
- int
- main ()
- {
-@@ -8820,7 +8820,7 @@ if ac_fn_c_try_compile "$LINENO"; then :
- else
-   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
- /* end confdefs.h.  */
--#include <sgidefs.h>
-+#include <asm/sgidefs.h>
- int
- main ()
- {
-diff -urpN strace-4.15.orig/configure.ac strace-4.15/configure.ac
---- strace-4.15.orig/configure.ac	2016-12-07 02:59:52.000000000 -0800
-+++ strace-4.15/configure.ac	2017-01-19 22:32:35.768433437 -0800
-@@ -212,20 +212,20 @@ MIPS_ABI=
- if test "$arch" = mips; then
- 	AC_CACHE_CHECK([for _MIPS_SIM], [st_cv__MIPS_SIM],
- 		       [AC_COMPUTE_INT([st_cv__MIPS_SIM], [_MIPS_SIM],
--				       [#include <sgidefs.h>],
-+				       [#include <asm/sgidefs.h>],
- 				       [AC_MSG_ERROR([_MIPS_SIM cannot be determined])])])
- 
- 	AC_CACHE_CHECK([for MIPS ABI], [st_cv_mips_abi],
- 		[AC_COMPILE_IFELSE(
--			[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
-+			[AC_LANG_PROGRAM([[#include <asm/sgidefs.h>]],
- 					 [[int i[_MIPS_SIM == _MIPS_SIM_ABI32 ? 1 : - 1];]])],
- 			[st_cv_mips_abi=o32],
- 		[AC_COMPILE_IFELSE(
--			[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
-+			[AC_LANG_PROGRAM([[#include <asm/sgidefs.h>]],
- 					 [[int i[_MIPS_SIM == _MIPS_SIM_NABI32 ? 1 : - 1];]])],
- 			[st_cv_mips_abi=n32],
- 		[AC_COMPILE_IFELSE(
--			[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
-+			[AC_LANG_PROGRAM([[#include <asm/sgidefs.h>]],
- 					 [[int i[_MIPS_SIM == _MIPS_SIM_ABI64 ? 1 : - 1];]])],
- 			[st_cv_mips_abi=n64],
- 			[st_cv_mips_abi=unknown])])])])
diff --git a/scripts/build/arch.sh b/scripts/build/arch.sh
index 3d3611b..75d3e21 100644
--- a/scripts/build/arch.sh
+++ b/scripts/build/arch.sh
@@ -64,5 +64,10 @@ CT_DoArchMUSLHeaderDir() {
     :;
 }
 
+# MUSL: Perform any final adjustments on the installed libc/headers
+CT_DoArchMUSLPostInstall() {
+    :;
+}
+
 # Override from the actual arch implementation as needed.
 . "${CT_LIB_DIR}/scripts/build/arch/${CT_ARCH}.sh"
diff --git a/scripts/build/arch/mips.sh b/scripts/build/arch/mips.sh
index 6097c89..f91a80a 100644
--- a/scripts/build/arch/mips.sh
+++ b/scripts/build/arch/mips.sh
@@ -69,3 +69,22 @@ CT_DoArchUClibcCflags() {
         esac
     done
 }
+
+CT_DoArchMUSLPostInstall() {
+    # GDB and MUSL maintainers seem to disagree on whether <sgidefs.h>
+    # is to be provided as a part of C library. GDB guys think it is
+    # a C library responsibility, while MUSL authors think GDB should
+    # not be using <sgidefs.h>. Neither side is willing to reach out
+    # to the other and negotiate the needed changes, and I don't want
+    # to play the middle man. Hence, provide our own wrapper for
+    # for <sgidefs.h> - the only solution short of telling MUSL users
+    # stop using it. This is why MUSL is experimental in ct-ng and
+    # will likely remain in that status.
+    # References:
+    #   http://www.openwall.com/lists/musl/2017/01/26/2
+    #   https://sourceware.org/ml/gdb-patches/2017-01/msg00469.html
+    #   https://www.sourceware.org/ml/libc-alpha/2004-11/msg00034.html
+    if [ ! -r "${CT_HEADERS_DIR}/sgidefs.h" ]; then
+        echo "#include <asm/sgidefs.h> // Redirected by ct-ng" > "${CT_HEADERS_DIR}/sgidefs.h"
+    fi
+}
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
index 9bbd95a..4ccb84c 100644
--- a/scripts/build/libc/musl.sh
+++ b/scripts/build/libc/musl.sh
@@ -154,6 +154,9 @@ do_libc_backend_once() {
                     ;;
             esac
         done
+
+        # Any additional actions for this architecture
+        CT_DoArchMUSLPostInstall
     fi
 
     CT_EndStep