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Flang 19 deprecation #193

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Merged
bonachea merged 3 commits into from
Jun 30, 2026
Merged

Flang 19 deprecation #193

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7adadf1
Revert "Update flang floor in CI and README to be v20"
bonachea Jun 30, 2026
2e09b91
README: Add a deprecation notice for flang 19
bonachea Jun 30, 2026
49d2966
Apply suggestion from @ktras
bonachea Jun 30, 2026
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5 changes: 5 additions & 0 deletions .github/workflows/build.yml
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Expand Up @@ -72,6 +72,11 @@ jobs:
compiler: flang
version: 20
container: phhargrove/llvm-flang:20.1.0-latest
- os: ubuntu-24.04
compiler: flang
version: 19
extra_flags: -g -mmlir -allow-assumed-rank -O3
container: phhargrove/llvm-flang:19.1.1-latest

# --- Intel coverage ---
# Julienne requires 2025.2.0 or later
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3 changes: 3 additions & 0 deletions README.md
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Expand Up @@ -194,6 +194,7 @@ Compiler/Runtime |Tested Versions|Run Type|Example build/test commands (paralle
------------------|---------------|--------|------------------------------------------------------------
LLVM/[Caffeine] |22.0.0git |parallel|`fpm test --compiler flang-new --flag "-O3 -DHAVE_MULTI_IMAGE_SUPPORT -fcoarray" --link-flag "-lcaffeine -lgasnet-smp-seq -L<caffeine-path> -L<gasnet-path>"`
LLVM |20-22 |serial |`fpm test --compiler flang-new --flag -O3`
LLVM |19 (+) |serial |`fpm test --compiler flang-new --flag "-O3 -mmlir -allow-assumed-rank"`
LFortran |0.60.0-421-ge2c448c79 |serial |`fpm test --compiler lfortran --flag "--cpp --realloc-lhs-arrays --separate-compilation"`
NAG |7.2, Build 7235|parallel|`NAGFORTRAN_NUM_IMAGES=2 fpm test --compiler nagfor --flag "-fpp -O3 -coarray"`
Intel |2025.2.{0-1} |parallel|`FOR_COARRAY_NUM_IMAGES=2 fpm test --compiler ifx --flag "-fpp -O3 -coarray" --profile release`
Expand All @@ -202,6 +203,8 @@ GCC |14-15 |parallel|`fpm test --compiler caf --runner "c
GCC/[OpenCoarrays]|13 |serial |`fpm test --compiler gfortran --profile release --flag -ffree-line-length-none`
GCC |13 |parallel|`fpm test --compiler caf --runner "cafrun -n 2" --profile release --flag -ffree-line-length-none`

(+) Support for LLVM flang version 19 is deprecated, and may be removed in a future release.

The test output reports a test as skipped if there is a known issue that blocks
the tested feature with the chosen compiler version or platform. Due to a
GitHub continuous-integration (CI) issue, the default behavior is to skip the
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