Remove GCC support

Author: jwnrt

.github/workflows/toolchain_build.yml

@@ -25,14 +25,14 @@ jobs:
           - os: ubuntu-24.04-arm
             host_arch: aarch64
           - name: rv32imcb
-            display_name: Toolchains targeting Ibex with bit-manipulation extensions
+            display_name: RV32IMCB toolchains (Ibex)
             target: riscv32-unknown-elf
             output_dir: /tools/riscv
             march: rv32imc_zba_zbb_zbc_zbs
             mabi: ilp32
             mcmodel: medany
           - name: rv64imac
-            display_name: GCC and Clang/LLVM toolchains targeting RV64IMAC (Muntjac)
+            display_name: RV64IMAC toolchains (Muntjac)
             target: riscv64-unknown-elf
             output_dir: /tools/riscv
             march: rv64imac
@@ -79,17 +79,6 @@ jobs:
             "${{ matrix.target }}" \
             "${{ matrix.output_dir }}"
 
-      - name: Build GCC toolchain
-        run: |
-          ./build-gcc-with-args.sh \
-            "lowrisc-toolchain-gcc-${{ matrix.name }}" \
-            "${{ matrix.target }}" \
-            "${{ matrix.output_dir }}" \
-            "${{ matrix.march }}" \
-            "${{ matrix.mabi}}" \
-            "${{ matrix.mcmodel }}" \
-            "${{ matrix.cflags }}"
-
       - name: Build Clang toolchain
         run: |
           ./build-clang-with-args.sh \

README.md

@@ -9,8 +9,8 @@ Head over to the
 [GitHub releases for this repository](https://github.com/lowRISC/lowrisc-toolchains/releases)
 for pre-built toolchains.
 
-* A GCC RV32IMC without hardfloat support, targeting [Ibex](https://github.com/lowRISC/ibex/)
-* A GCC RV64IMAC, targeting [Muntjac](https://github.com/lowRISC/muntjac)
+* Clang RV32IMCB without hardfloat support, targeting [Ibex](https://github.com/lowRISC/ibex/)
+* Clang RV64IMAC, targeting [Muntjac](https://github.com/lowRISC/muntjac)
 
 How to do a release
 -------------------

build-clang-with-args.sh

@@ -5,8 +5,6 @@
 
 ## build-clang-with-args.sh
 #
-# This requires a gcc toolchain dir made by `build-gcc-with-args.sh`
-#
 # Builds:
 # - Clang/LLVM
 #
@@ -26,10 +24,8 @@ fi;
 
 ## Take configuration from arguments
 # This is the name for the tar file.
-# Suggested to be the gcc config with s/gcc/clang/. Will be updated if it
-# contains 'gcc'
 toolchain_name="${1}"
-# This is the expected gcc target triple (so we can set a default, and invoke gcc)
+# This is the expected target triple (so we can set a default)
 toolchain_target="${2}"
 # This is the directory where we want the toolchain to added to
 toolchain_dest="${3}"
@@ -142,7 +138,6 @@ ls -l "${toolchain_dest}"
 set +o pipefail # head causes pipe failures, so we have to switch off pipefail while we use it.
 ct_ng_version_string="$( (set +o pipefail; ct-ng version | head -n1) )"
 clang_version_string="$("${toolchain_dest}/bin/clang" --version | head -n1)"
-gcc_version_string="$("${toolchain_dest}/bin/${toolchain_target}-gcc" --version | head -n1)"
 build_date="$(date -u)"
 set -o pipefail
 
@@ -156,9 +151,6 @@ Clang version:
   ${clang_version_string}
   (git: ${LLVM_URL} ${LLVM_VERSION})
 
-GCC version:
-  ${gcc_version_string}
-
 Crosstool-ng version:
   ${ct_ng_version_string}
   (git: ${CROSSTOOL_NG_URL} ${CROSSTOOL_NG_VERSION})
@@ -177,7 +169,6 @@ tee "${toolchain_dest}/buildinfo.json" <<BUILDINFO_JSON
   "clang_version": "${clang_version_string}",
   "clang_url": "${LLVM_URL}",
   "clang_git": "${LLVM_VERSION}",
-  "gcc_version": "${gcc_version_string}",
   "crosstool-ng_version": "${ct_ng_version_string}",
   "crosstool-ng_url": "${CROSSTOOL_NG_URL}",
   "crosstool-ng_git": "${CROSSTOOL_NG_VERSION}",

build-gcc-with-args.sh

@@ -78,7 +78,7 @@ fi
 # https://github.com/phusion/holy-build-box/blob/master/ESSENTIAL-SYSTEM-LIBRARIES.md
 # for details.
 
-# Clang and GCC link against the following libraries, which must be present at
+# Clang links against the following libraries, which must be present at
 # runtime:
 # - libz.so.1 (zlib)
 # - libncursesw.so.5 and libtinfo.so.5 (ncurses5)