This produces a toolchain that can successfully build binaries targeting
riscv*-gnu.
gcc/ChangeLog:
* config.gcc: Recognize riscv*-*-gnu* targets.
* config/riscv/gnu.h: New file.
Signed-off-by: Hakan Candar <hakancan...@protonmail.com>
---
gcc/config.gcc | 14 ++++++++++
gcc/config/riscv/gnu.h | 59 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 73 insertions(+)
create mode 100644 gcc/config/riscv/gnu.h
diff --git a/gcc/config.gcc b/gcc/config.gcc
index f7f2002a45f..a01ba713a6c 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -2540,6 +2540,20 @@ riscv*-*-linux*)
gcc_cv_initfini_array=yes
with_tls=${with_tls:-trad}
;;
+riscv*-*-gnu*)
+ tm_file="elfos.h gnu-user.h gnu.h glibc-stdint.h ${tm_file} riscv/gnu.h"
+ tmake_file="${tmake_file} riscv/t-riscv"
+ gnu_ld=yes
+ gas=yes
+ case $target in
+ riscv32be-*|riscv64be-*)
+ tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1"
+ ;;
+ esac
+ # Force .init_array support. The configure script cannot always
+ # automatically detect that GAS supports it, yet we require it.
+ gcc_cv_initfini_array=yes
+ ;;
riscv*-*-elf* | riscv*-*-rtems*)
tm_file="elfos.h newlib-stdint.h ${tm_file} riscv/elf.h"
case ${target} in
diff --git a/gcc/config/riscv/gnu.h b/gcc/config/riscv/gnu.h
new file mode 100644
index 00000000000..047399b10ff
--- /dev/null
+++ b/gcc/config/riscv/gnu.h
@@ -0,0 +1,59 @@
+/* Definitions for RISC-V GNU/Hurd systems with ELF format.
+ Copyright (C) 1998-2025 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#define TARGET_OS_CPP_BUILTINS() \
+ do { \
+ GNU_USER_TARGET_OS_CPP_BUILTINS(); \
+ } while (0)
+
+#define GNU_USER_DYNAMIC_LINKER "/lib/ld-riscv" XLEN_SPEC "-" ABI_SPEC ".so.1"
+
+#define ICACHE_FLUSH_FUNC "__riscv_flush_icache"
+
+#define CPP_SPEC "%{pthread:-D_REENTRANT}"
+
+#define LD_EMUL_SUFFIX \
+ "%{mabi=lp64d:}" \
+ "%{mabi=lp64f:_lp64f}" \
+ "%{mabi=lp64:_lp64}" \
+ "%{mabi=ilp32d:}" \
+ "%{mabi=ilp32f:_ilp32f}" \
+ "%{mabi=ilp32:_ilp32}"
+
+#define LINK_SPEC "\
+-melf" XLEN_SPEC DEFAULT_ENDIAN_SPEC "riscv" LD_EMUL_SUFFIX " \
+%{mno-relax:--no-relax} \
+-X \
+%{mbig-endian:-EB} \
+%{mlittle-endian:-EL} \
+%{shared} \
+ %{!shared: \
+ %{!static: \
+ %{!static-pie: \
+ %{rdynamic:-export-dynamic} \
+ -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} \
+ %{static:-static} %{static-pie:-static -pie --no-dynamic-linker -z text}}"
+
+#define STARTFILE_PREFIX_SPEC \
+ "/lib" XLEN_SPEC "/" ABI_SPEC "/ " \
+ "/usr/lib" XLEN_SPEC "/" ABI_SPEC "/ " \
+ "/lib/ " \
+ "/usr/lib/ "
+
+#define RISCV_USE_CUSTOMISED_MULTI_LIB select_by_abi
--
2.47.0
