[MacPorts] #72156: flang-20 failed to build on 10.15

[MacPorts]

#72156: flang-20 failed to build on 10.15
--------------------+------------------------------
 Reporter:  jmroot  |      Owner:  cjones051073
     Type:  defect  |     Status:  assigned
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  flang-20 llvm-20
--------------------+------------------------------
 With clang-14:
 {{{
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-project-20.1.0.src/flang/runtime/time-intrinsic.cpp:148:28: error:
 use of undeclared identifier 'TIME_UTC'
   if (timespec_get(&tspec, TIME_UTC) < 0) {
                            ^
 }}}
 https://build.macports.org/builders/ports-10.15_x86_64-builder/builds/207211/steps
 /install-port/logs/stdio

 With clang-16:
 {{{
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-
 project-20.1.0.src/flang/lib/Optimizer/Dialect/Support/FIRContext.cpp:13:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-
 project-20.1.0.src/flang/include/flang/Optimizer/Dialect/Support/FIRContext.h:20:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-
 project-20.1.0.src/flang/../mlir/include/mlir/Dialect/LLVMIR/LLVMAttrs.h:17:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-
 project-20.1.0.src/flang/../mlir/include/mlir/Dialect/LLVMIR/LLVMTypes.h:17:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-project-20.1.0.src/flang/../mlir/include/mlir/IR/Types.h:12:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-project-20.1.0.src/flang/../mlir/include/mlir/IR/TypeSupport.h:16:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-project-20.1.0.src/flang/../mlir/include/mlir/IR/MLIRContext.h:12:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-project-20.1.0.src/flang/../mlir/include/mlir/Support/LLVM.h:23:
 In file included from
 /opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_lang_llvm-20/flang-20/work
 /llvm-project-20.1.0.src/llvm/include/llvm/Support/Casting.h:20:
 In file included from
 /opt/local/libexec/llvm-16/bin/../include/c++/v1/memory:884:
 In file included from
 /opt/local/libexec/llvm-16/bin/../include/c++/v1/__memory/allocate_at_least.h:13:
 In file included from
 /opt/local/libexec/llvm-16/bin/../include/c++/v1/__memory/allocator_traits.h:14:
 In file included from
 /opt/local/libexec/llvm-16/bin/../include/c++/v1/__memory/construct_at.h:23:
 /opt/local/libexec/llvm-16/bin/../include/c++/v1/new:355:14: error: no
 member named 'aligned_alloc' in the global namespace
     return ::aligned_alloc(__alignment, __size > __rounded_size ? __size :
 __rounded_size);
            ~~^
 }}}
 https://build.macports.org/builders/ports-10.15_x86_64-builder/builds/207244/steps
 /install-port/logs/stdio

 The latter is #69699 which appears to have been fixed in LLVM 17.

-- 
Ticket URL: <https://trac.macports.org/ticket/72156>
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