[MacPorts] #62426: libc++: using a newer libc++ to build software on older macos systems
MacPorts
noreply at macports.org
Tue Sep 27 13:09:25 UTC 2022
#62426: libc++: using a newer libc++ to build software on older macos systems
-------------------------------------+--------------------
Reporter: kencu | Owner: kencu
Type: enhancement | Status: closed
Priority: Normal | Milestone:
Component: ports | Version:
Resolution: fixed | Keywords:
Port: libcxx macports-libcxx |
-------------------------------------+--------------------
Comment (by RJVB):
Adding `-D_LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT` to the test build
doesn't make a difference, but I think it stands to reason that
libLLVM.dylib should also have been built with it.
BTW, here's an interesting manifestation of what could be the same
problem:
{{{
> sudo install_name_tool -change {/usr,/opt/local}/lib/libc++.1.dylib
/opt/local/libexec/llvm-12/lib/libLLVM.dylib ; build-libcxx-test.sh
clang++-mp-12 -I/opt/local/libexec/llvm-12/include/
-Wl,-rpath,/opt/local/libexec/llvm-12/lib -L/opt/local/libexec/llvm-12/lib
-v
clang version 12.0.1
Target: x86_64-apple-darwin13.4.0
Thread model: posix
InstalledDir: /opt/local/libexec/llvm-12/bin
clang: warning: -Wl,-rpath,/opt/local/libexec/llvm-12/lib: 'linker' input
unused [-Wunused-command-line-argument]
clang: warning: argument unused during compilation:
'-L/opt/local/libexec/llvm-12/lib' [-Wunused-command-line-argument]
(in-process)
"/Volumes/Debian/MP9/libexec/llvm-12/bin/clang" -cc1 -triple x86_64
-apple-macosx10.9.0 -Wundef-prefix=TARGET_OS_ -Werror=undef-prefix
-Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -emit-obj
-mrelax-all --mrelax-relocations -disable-free -disable-llvm-verifier
-discard-value-names -main-file-name libcxx-test.cpp -mrelocation-model
pic -pic-level 2 -mframe-pointer=all -fno-rounding-math -munwind-tables
-faligned-alloc-unavailable -fcompatibility-qualified-id-block-type-
checking -fvisibility-inlines-hidden-static-local-var -target-cpu core2
-tune-cpu generic -debugger-tuning=lldb -target-linker-version 450.3 -v
-resource-dir /Volumes/Debian/MP9/libexec/llvm-12/lib/clang/12.0.1 -D
__STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I
/opt/local/libexec/llvm-12/include/ -stdlib=libc++ -internal-isystem
/opt/local/libexec/llvm-12/bin/../include/c++/v1 -internal-isystem
/usr/local/include -internal-isystem
/Volumes/Debian/MP9/libexec/llvm-12/lib/clang/12.0.1/include -internal-
externc-isystem /usr/include -std=c++17 -fdeprecated-macro -fdebug-
compilation-dir /Volumes/Debian/Users/bertin/work/src/new -ferror-limit 19
-fmessage-length=132 -stack-protector 1 -fblocks -fencode-extended-block-
signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fcxx-
exceptions -fexceptions -fmax-type-align=16 -fcolor-diagnostics -o libcxx-
test.o -x c++ libcxx-test.cpp
clang -cc1 version 12.0.1 based upon LLVM 12.0.1 default target x86_64
-apple-darwin13.4.0
#include "..." search starts here:
#include <...> search starts here:
/opt/local/libexec/llvm-12/include
/opt/local/libexec/llvm-12/bin/../include/c++/v1
/usr/local/include
/Volumes/Debian/MP9/libexec/llvm-12/lib/clang/12.0.1/include
/usr/include
/System/Library/Frameworks (framework directory)
/Library/Frameworks (framework directory)
End of search list.
libcxx-test.cpp:1:10: fatal error: cannot open file
'./llvm/Support/Errc.h': No such file or directory
#include "llvm/Support/Errc.h"
^
1 error generated.
clang version 12.0.1
Target: x86_64-apple-darwin13.4.0
Thread model: posix
InstalledDir: /opt/local/libexec/llvm-12/bin
clang: error: no such file or directory: 'libcxx-test.o'
Exit 1
}}}
{{{
> sudo install_name_tool -change {/opt/local,/usr}/lib/libc++.1.dylib
/opt/local/libexec/llvm-12/lib/libLLVM.dylib ; build-libcxx-test.sh
clang++-mp-12 -I/opt/local/libexec/llvm-12/include/
-Wl,-rpath,/opt/local/libexec/llvm-12/lib -L/opt/local/libexec/llvm-12/lib
clang: warning: -Wl,-rpath,/opt/local/libexec/llvm-12/lib: 'linker' input
unused [-Wunused-command-line-argument]
clang: warning: argument unused during compilation:
'-L/opt/local/libexec/llvm-12/lib' [-Wunused-command-line-argument]
}}}
--
Ticket URL: <https://trac.macports.org/ticket/62426#comment:70>
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