new file mode 100644
@@ -0,0 +1,46 @@
+From 1854c332efa0ed5b9140d8df2a983625a1e2d9ef Mon Sep 17 00:00:00 2001
+From: Romain Naour <romain.naour@gmail.com>
+Date: Sun, 5 May 2019 10:56:30 +0200
+Subject: [PATCH] [RFC] sparc: syscalls.h: remove asm constraint
+
+uClibc-ng don't build with gcc 9.1 [1] due to a new check that
+"catch illegal asm constraint usage" [2].
+
+gcc 9.1 print this error:
+"invalid hard register usage between earlyclobber operand and input operand"
+
+The asm constraint is present in uClibc since it support sparc (back in 2002)[3].
+
+Note: There is no such constraint is Glibc counterpart code [4].
+
+[1] https://gitlab.com/kubu93/toolchains-builder/-/jobs/205435757
+[2] https://github.com/gcc-mirror/gcc/commit/b782636f28f5c378897c238081d28d7a4a6ca578
+[3] https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=3b6d086531102b6d09ce852feb1e370d5dca3ce9
+[4] https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/sparc/sysdep.h;h=981b2a26b7a91093f821c97876e55bc4be2d9f8a;hb=HEAD
+
+Signed-off-by: Romain Naour <romain.naour@gmail.com>
+Cc: Waldemar Brodkorb <wbx@openadk.org>
+---
+I did not fully analyze the asm code to understand why the constraint is present.
+I lightly tested using qemu_sparc_ss10_defconfig.
+Any help is welcome :)
+---
+ libc/sysdeps/linux/sparc/bits/syscalls.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libc/sysdeps/linux/sparc/bits/syscalls.h b/libc/sysdeps/linux/sparc/bits/syscalls.h
+index 75af7a1573..e52ab98466 100644
+--- a/libc/sysdeps/linux/sparc/bits/syscalls.h
++++ b/libc/sysdeps/linux/sparc/bits/syscalls.h
+@@ -33,7 +33,7 @@
+ register long __g1 __asm__("g1") = sys_num; \
+ LOAD_ARGS_##nr(args) \
+ __asm__ __volatile__( __SYSCALL_STRING \
+- : "=r" (__res), "=&r" (__o0) \
++ : "=r" (__res), "=r" (__o0) \
+ : "1" (__o0) ASM_ARGS_##nr, "r" (__g1) \
+ : __SYSCALL_CLOBBERS ); \
+ } \
+--
+2.14.5
+
uClibc-ng don't build with gcc 9.1 [1] due to a new check that "catch illegal asm constraint usage" [2]. gcc 9.1 print this error: "invalid hard register usage between earlyclobber operand and input operand" The asm constraint is present in uClibc since it support sparc (back in 2002)[3]. Note: There is no such constraint is Glibc counterpart code [4]. [1] https://gitlab.com/kubu93/toolchains-builder/-/jobs/205435757 [2] https://github.com/gcc-mirror/gcc/commit/b782636f28f5c378897c238081d28d7a4a6ca578 [3] https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=3b6d086531102b6d09ce852feb1e370d5dca3ce9 [4] https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/sparc/sysdep.h;h=981b2a26b7a91093f821c97876e55bc4be2d9f8a;hb=HEAD Signed-off-by: Romain Naour <romain.naour@gmail.com> Cc: Waldemar Brodkorb <wbx@openadk.org> --- I did not fully analyze the asm code to understand why the constraint is present. I lightly tested using qemu_sparc_ss10_defconfig. Any help is welcome :) --- ...FC-sparc-syscalls.h-remove-asm-constraint.patch | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 package/uclibc/0003-RFC-sparc-syscalls.h-remove-asm-constraint.patch