b405407a48
In, https://reviews.llvm.org/D120305, CLANG_DEFAULT_PIE_ON_LINUX was set to `On` by default. However, neither `-fpie` nor `-fpic` are currently supported in LLVM Flang. Hence, in this patch the behaviour controlled with CLANG_DEFAULT_PIE_ON_LINUX is refined not to apply to Flang. Another way to look at this is that CLANG_DEFAULT_PIE_ON_LINUX is currently affecting both Clang and Flang. IIUC, the intention for this CMake variable has always been to only affect Clang. This patch makes sure that that's the case. Without this change, you might see errors like this on X86_64: ``` /usr/bin/ld: main.o: relocation R_X86_64_32 against `.bss' can not be used when making a PIE object; recompile with -fPIC ``` I've not experienced any issues on AArch64. That's probably because on AArch64 some object files happen to be position independent without needing -fpie or -fpic. Differential Revision: https://reviews.llvm.org/D128333
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2.5 KiB
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65 lines
2.5 KiB
Markdown
# Flang 15.0.0 (In-Progress) Release Notes
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> **warning**
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>
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> These are in-progress notes for the upcoming LLVM 15.0.0 release.
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> Release notes for previous releases can be found on [the Download
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> Page](https://releases.llvm.org/download.html).
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## Introduction
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This document contains the release notes for the Flang Fortran frontend,
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part of the LLVM Compiler Infrastructure, release 15.0.0. Here we
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describe the status of Flang in some detail, including major
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improvements from the previous release and new feature work. For the
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general LLVM release notes, see [the LLVM
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documentation](https://llvm.org/docs/ReleaseNotes.html). All LLVM
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releases may be downloaded from the [LLVM releases web
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site](https://llvm.org/releases/).
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Note that if you are reading this file from a Git checkout, this
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document applies to the *next* release, not the current one. To see the
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release notes for a specific release, please see the [releases
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page](https://llvm.org/releases/).
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## Major New Features
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## Bug Fixes
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## Non-comprehensive list of changes in this release
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* The bash wrapper script, `flang`, is renamed as `flang-to-external-fc`.
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* In contrast to Clang, Flang will not default to using `-fpie` when linking
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executables. This is only a temporary solution and the goal is to align with
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Clang in the near future. First, however, the frontend driver needs to be
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extended so that it can generate position independent code (that requires
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adding support for e.g. `-fpic` and `-mrelocation-model` in `flang-new
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-fc1`). Once that is available, support for the `-fpie` can officially be
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added and the default behaviour updated.
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## New Compiler Flags
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* Refined how `-f{no-}color-diagnostics` is treated to better align with Clang.
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In particular, both `-fcolor-diagnostics` and `-fno-color-diagnostics` are
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now available in `flang-new` (the diagnostics are formatted by default). In
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the frontend driver, `flang-new -fc1`, only `-fcolor-diagnostics` is
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available (by default, the diagnostics are not formatted). Note that this
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will only affect the diagnostics printed by driver (scanning, parsing and
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semantic diagnostics are not affected).
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## Windows Support
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## Fortran Language Changes in Flang
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## Build System Changes
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## New Issues Found
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## Additional Information
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Flang's documentation is located in the `flang/docs/` directory in the
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LLVM monorepo.
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If you have any questions or comments about Flang, please feel free to
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contact us via the [mailing
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list](https://lists.llvm.org/mailman/listinfo/flang-dev).
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