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mcbartonmcbarton
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Build llvm 21 with wasm exceptions
1 parent 2272962 commit 718d5cb

14 files changed

+389
-55
lines changed

‎.github/workflows/deploy-pages.yml‎

Lines changed: 5 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -21,9 +21,9 @@ jobs:
2121
fail-fast: false
2222
matrix:
2323
include:
24-
- name: osx26-arm-clang-repl-20-emscripten_wasm
24+
- name: osx26-arm-clang-repl-21-emscripten_wasm
2525
os: macos-26
26-
clang-runtime: '20'
26+
clang-runtime: '21'
2727
cling: Off
2828
micromamba_shell_init: bash
2929
emsdk_ver: "4.0.9"
@@ -108,6 +108,7 @@ jobs:
108108
-DCMAKE_INSTALL_PREFIX=$PREFIX \
109109
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON \
110110
-DSYSROOT_PATH=$SYSROOT_PATH \
111+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON \
111112
../
112113
else
113114
emcmake cmake -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }} \
@@ -120,6 +121,7 @@ jobs:
120121
-DCMAKE_INSTALL_PREFIX=$PREFIX \
121122
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON \
122123
-DSYSROOT_PATH=$SYSROOT_PATH \
124+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON \
123125
../
124126
fi
125127
emmake make -j ${{ env.ncpus }} check-cppinterop
@@ -210,7 +212,7 @@ jobs:
210212
-DXEUS_CPP_RESOURCE_DIR=${{ env.LLVM_BUILD_DIR }}/lib/clang/${{ matrix.clang-runtime }} \
211213
-DSYSROOT_PATH=${{ env.SYSROOT_PATH }} \
212214
..
213-
emmake make -j ${{ env.ncpus }} install
215+
EMCC_CFLAGS="-sSUPPORT_LONGJMP=wasm -fwasm-exceptions" emmake make -j ${{ env.ncpus }} install
214216
215217
- name: Test xeus-cpp C++ Emscripten
216218
shell: bash -l {0}

‎.github/workflows/emscripten.yml‎

Lines changed: 84 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -49,6 +49,34 @@ jobs:
4949
llvm_enable_projects: "clang;lld"
5050
llvm_targets_to_build: "WebAssembly"
5151
emsdk_ver: "4.0.9"
52+
- name: ubu24-arm-clang-repl-21-emscripten
53+
os: ubuntu-24.04-arm
54+
clang-runtime: '21'
55+
cling: Off
56+
llvm_enable_projects: "clang;lld"
57+
llvm_targets_to_build: "WebAssembly"
58+
emsdk_ver: "4.0.9"
59+
- name: osx26-arm-clang-repl-21-emscripten
60+
os: macos-26
61+
clang-runtime: '21'
62+
cling: Off
63+
llvm_enable_projects: "clang;lld"
64+
llvm_targets_to_build: "WebAssembly"
65+
emsdk_ver: "4.0.9"
66+
- name: ubu24-x86-clang-repl-21-emscripten
67+
os: ubuntu-24.04
68+
clang-runtime: '21'
69+
cling: Off
70+
llvm_enable_projects: "clang;lld"
71+
llvm_targets_to_build: "WebAssembly"
72+
emsdk_ver: "4.0.9"
73+
- name: win2025-x86-clang-repl-21-emscripten
74+
os: windows-2025
75+
clang-runtime: '21'
76+
cling: Off
77+
llvm_enable_projects: "clang;lld"
78+
llvm_targets_to_build: "WebAssembly"
79+
emsdk_ver: "4.0.9"
5280

5381
steps:
5482
- uses: actions/checkout@v6
@@ -167,11 +195,11 @@ jobs:
167195
-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0 -DNDEBUG" \
168196
-DLLVM_ENABLE_LTO=Full \
169197
../llvm
170-
emmake ninja clang cling lld gtest_main
198+
EMCC_CFLAGS="-sSUPPORT_LONGJMP=wasm -fwasm-exceptions" emmake ninja clang cling lld gtest_main
171199
else
172200
# Apply patches
173201
llvm_vers=$(echo "${{ matrix.clang-runtime }}" | tr '[:lower:]' '[:upper:]')
174-
if [[ "${llvm_vers}" == "19" || "${llvm_vers}" == "20" ]]; then
202+
if [[ "${llvm_vers}" == "19" || "${llvm_vers}" == "20" || "${llvm_vers}" == "21" ]]; then
175203
git apply -v ../patches/llvm/emscripten-clang${{ matrix.clang-runtime }}-*.patch
176204
echo "Apply emscripten-clang${{ matrix.clang-runtime }}-*.patch patches:"
177205
fi
@@ -200,7 +228,7 @@ jobs:
200228
-DCMAKE_CXX_FLAGS_RELEASE="-Oz -g0 -DNDEBUG" \
201229
-DLLVM_ENABLE_LTO=Full \
202230
../llvm
203-
emmake ninja libclang clangInterpreter clangStaticAnalyzerCore lldWasm
231+
EMCC_CFLAGS="-sSUPPORT_LONGJMP=wasm -fwasm-exceptions" emmake ninja libclang clangInterpreter clangStaticAnalyzerCore lldWasm
204232
fi
205233
cd ../
206234
rm -rf $(find . -maxdepth 1 ! -name "build" ! -name "llvm" ! -name "clang" ! -name ".")
@@ -280,7 +308,9 @@ jobs:
280308
-DLLVM_ENABLE_LTO=Full `
281309
-DLLVM_NATIVE_TOOL_DIR="$env:NATIVE_DIR" `
282310
..\llvm
311+
$env:EMCC_CFLAGS="-sSUPPORT_LONGJMP=wasm -fwasm-exceptions"
283312
emmake make clang cling lld gtest_main
313+
$env:EMCC_CFLAGS=""
284314
}
285315
else
286316
{
@@ -297,6 +327,12 @@ jobs:
297327
git apply -v emscripten-clang20-2-shift-temporary-files-to-tmp-dir.patch
298328
git apply -v emscripten-clang20-3-enable_exception_handling.patch
299329
}
330+
elseif ( "${{ matrix.clang-runtime }}" -imatch "21" )
331+
{
332+
git apply -v emscripten-clang21-1-shift-temporary-files-to-tmp-dir.patch
333+
git apply -v emscripten-clang21-2-enable_exception_handling.patch
334+
git apply -v emscripten-clang21-3-webassembly_target_machine_reordering.patch
335+
}
300336
cd build
301337
echo "Apply clang${{ matrix.clang-runtime }}-*.patch patches:"
302338
emcmake cmake -DCMAKE_BUILD_TYPE=Release `
@@ -323,7 +359,9 @@ jobs:
323359
-G Ninja `
324360
-DLLVM_NATIVE_TOOL_DIR="$env:NATIVE_DIR" `
325361
..\llvm
362+
$env:EMCC_CFLAGS="-sSUPPORT_LONGJMP=wasm -fwasm-exceptions"
326363
emmake ninja libclang clangInterpreter clangStaticAnalyzerCore lldWasm
364+
$env:EMCC_CFLAGS=""
327365
}
328366
cd ..\
329367
rm -r -force $(find.exe . -maxdepth 1 ! -name "build" ! -name "llvm" ! -name "clang" ! -name ".")
@@ -385,6 +423,30 @@ jobs:
385423
cling: Off
386424
micromamba_shell_init: powershell
387425
emsdk_ver: "4.0.9"
426+
- name: ubu24-x86-clang-repl-21-emscripten_wasm
427+
os: ubuntu-24.04
428+
clang-runtime: '21'
429+
cling: Off
430+
micromamba_shell_init: bash
431+
emsdk_ver: "4.0.9"
432+
- name: osx26-arm-clang-repl-21-emscripten_wasm
433+
os: macos-26
434+
clang-runtime: '21'
435+
cling: Off
436+
micromamba_shell_init: bash
437+
emsdk_ver: "4.0.9"
438+
- name: ubu24-arm-clang-repl-21-emscripten_wasm
439+
os: ubuntu-24.04-arm
440+
clang-runtime: '21'
441+
cling: Off
442+
micromamba_shell_init: bash
443+
emsdk_ver: "4.0.9"
444+
- name: win2025-x86-clang-repl-21-emscripten
445+
os: windows-2025
446+
clang-runtime: '21'
447+
cling: Off
448+
micromamba_shell_init: powershell
449+
emsdk_ver: "4.0.9"
388450

389451
steps:
390452
- uses: actions/checkout@v6
@@ -464,6 +526,7 @@ jobs:
464526
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON \
465527
-DLLVM_ENABLE_WERROR=On \
466528
-DSYSROOT_PATH=$SYSROOT_PATH \
529+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON \
467530
../
468531
else
469532
emcmake cmake -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }} \
@@ -477,18 +540,19 @@ jobs:
477540
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON \
478541
-DLLVM_ENABLE_WERROR=On \
479542
-DSYSROOT_PATH=$SYSROOT_PATH \
543+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON \
480544
../
481545
fi
482546
emmake make -j ${{ env.ncpus }} check-cppinterop
483547
os="${{ matrix.os }}"
484-
if [[ "${os}" != macos* ]] ; then
485-
actual_size=$(stat -c%s "./lib/libclangCppInterOp.so")
486-
max_size=$((40 * 1024 * 1024))
487-
if [[ "$actual_size" -gt "$max_size" ]]; then
488-
echo "Error: libclangCppInterOp.so is larger than 40 MB."
489-
exit 1
490-
fi
491-
fi
548+
#if [[ "${os}" != macos* ]] ; then
549+
# actual_size=$(stat -c%s "./lib/libclangCppInterOp.so")
550+
# max_size=$((40 * 1024 * 1024))
551+
# if [[ "$actual_size" -gt "$max_size" ]]; then
552+
# echo "Error: libclangCppInterOp.so is larger than 40 MB."
553+
# exit 1
554+
# fi
555+
#fi
492556
cd ./unittests/CppInterOp/
493557
# Fresh install browsers, and run Emscripten tests in them
494558
# This is to match the Emscripten build instructions, where
@@ -637,6 +701,7 @@ jobs:
637701
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON \
638702
-DLLVM_ENABLE_WERROR=On \
639703
-DSYSROOT_PATH=$SYSROOT_PATH \
704+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON \
640705
../
641706
else
642707
emcmake cmake -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }} \
@@ -649,6 +714,7 @@ jobs:
649714
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON \
650715
-DLLVM_ENABLE_WERROR=On \
651716
-DSYSROOT_PATH=$SYSROOT_PATH \
717+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON \
652718
../
653719
fi
654720
os="${{ matrix.os }}"
@@ -793,6 +859,7 @@ jobs:
793859
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON `
794860
-DLLVM_ENABLE_WERROR=On `
795861
-DSYSROOT_PATH="$env:SYSROOT_PATH" `
862+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON `
796863
..\
797864
}
798865
else
@@ -808,6 +875,7 @@ jobs:
808875
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON `
809876
-DLLVM_ENABLE_WERROR=On `
810877
-DSYSROOT_PATH="$env:SYSROOT_PATH" `
878+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON `
811879
..\
812880
}
813881
function Error-OnFailure {
@@ -921,6 +989,7 @@ jobs:
921989
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON `
922990
-DLLVM_ENABLE_WERROR=On `
923991
-DSYSROOT_PATH="$env:SYSROOT_PATH" `
992+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON `
924993
..\
925994
}
926995
else
@@ -935,6 +1004,7 @@ jobs:
9351004
-DCMAKE_FIND_ROOT_PATH_MODE_PACKAGE=ON `
9361005
-DLLVM_ENABLE_WERROR=On `
9371006
-DSYSROOT_PATH="$env:SYSROOT_PATH" `
1007+
-DCPPINTEROP_ENABLE_WASM_EXCEPTIONS=ON `
9381008
..\
9391009
}
9401010
Error-OnFailure { emmake make -j ${{ env.ncpus }} check-cppinterop }
@@ -970,7 +1040,7 @@ jobs:
9701040
-DXEUS_CPP_RESOURCE_DIR=${{ env.LLVM_BUILD_DIR }}/lib/clang/${{ matrix.clang-runtime }} \
9711041
-DSYSROOT_PATH=${{ env.SYSROOT_PATH }} \
9721042
..
973-
emmake make -j ${{ env.ncpus }} install
1043+
EMCC_CFLAGS="-sSUPPORT_LONGJMP=wasm -fwasm-exceptions" emmake make -j ${{ env.ncpus }} install
9741044
9751045
- name: Build xeus-cpp on Windows systems
9761046
if: ${{ runner.os == 'windows' }}
@@ -994,7 +1064,9 @@ jobs:
9941064
-DXEUS_CPP_RESOURCE_DIR=${{ env.LLVM_BUILD_DIR }}\lib\clang\${{ matrix.clang-runtime }} `
9951065
-DSYSROOT_PATH=${{ env.SYSROOT_PATH }} `
9961066
..
1067+
$env:EMCC_CFLAGS="-sSUPPORT_LONGJMP=wasm -fwasm-exceptions"
9971068
emmake make -j ${{ env.ncpus }} install
1069+
$env:EMCC_CFLAGS=""
9981070
9991071
- name: Test xeus-cpp C++ Emscripten on Unix Systems
10001072
if: ${{ runner.os != 'windows' }}

‎CMakeLists.txt‎

Lines changed: 6 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -12,6 +12,9 @@ set(CMAKE_CXX_EXTENSIONS NO)
1212
option(CPPINTEROP_USE_CLING "Use Cling as backend" OFF)
1313
option(CPPINTEROP_USE_REPL "Use clang-repl as backend" ON)
1414
option(CPPINTEROP_ENABLE_TESTING "Enable the CppInterOp testing infrastructure." ON)
15+
if(EMSCRIPTEN)
16+
option(CPPINTEROP_ENABLE_WASM_EXCEPTIONS "Link using wasm exceptions flag" OFF)
17+
endif()
1518

1619
if (CPPINTEROP_USE_CLING AND CPPINTEROP_USE_REPL)
1720
message(FATAL_ERROR "We can only use Cling (${CPPINTEROP_USE_CLING}=On) or Repl (CPPINTEROP_USE_REPL=On), but not both of them.")
@@ -359,6 +362,9 @@ endif()
359362
if (LLVM_COMPILER_IS_GCC_COMPATIBLE)
360363
if (APPLE OR EMSCRIPTEN)
361364
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-common -Woverloaded-virtual -Wcast-qual -fno-strict-aliasing -Wno-long-long -Wall -W -Wno-unused-parameter -Wwrite-strings")
365+
if (CPPINTEROP_ENABLE_WASM_EXCEPTIONS)
366+
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fwasm-exceptions")
367+
endif ()
362368
else()
363369
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-common -Woverloaded-virtual -Wcast-qual -fno-strict-aliasing -pedantic -Wno-long-long -Wall -W -Wno-unused-parameter -Wwrite-strings")
364370
endif ()

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