derek.holloway
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23 lines
1.2 KiB
Fortran
23 lines
1.2 KiB
Fortran
! In release 2.34, glibc removed libpthread as a separate library. All the
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! pthread_* functions were subsumed into libc, so linking that is sufficient.
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! However, when linking against older glibc builds, the explicit link of
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! -pthread will be required. More details are here:
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!
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! https://developers.redhat.com/articles/2021/12/17/why-glibc-234-removed-libpthread#the_developer_view
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!
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! This makes it difficult to write a test that requires the -pthread flag in
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! order to pass. Checking for the presence of -lpthread in the linker flags is
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! not reliable since the linker could just skip the flag altogether if it is
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! linking against a new libc implementation.
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! RUN: %flang -### -pthread /dev/null -o /dev/null 2>&1 | FileCheck %s
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! RUN: %flang -### -Xflang -pthread /dev/null -o /dev/null 2>&1 | FileCheck %s
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! How the -pthread flag is handled is very platform-specific. A lot of that
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! functionality is tested by clang, and the flag itself is handled by clang's
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! driver that flang also uses. Instead of duplicating all that testing here,
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! just check that the presence of the flag does not raise an error. If we need
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! more customized handling of -pthread, the tests for that can be added here.
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!
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! CHECK-NOT: error:
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