Hi David, Hi Fang-rui, Just to remind, when I add -save-temps flag, linking works, but without this option it fails with:
clang-8: error: unable to make temporary file: No such file or directory clang-8: error: unable to make temporary file: No such file or directory clang-8: error: unable to make temporary file: No such file or directory Here is the output with flags -save-temps, -###: "/usr/bin/clang-8" "-cc1" "-triple" "x86_64-unknown-windows-cygnus" "-S" "-save-temps=cwd" "-disable-free" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "my_files\\my_file1.bc" "-mrelocation-model" "pic" "-pic-level" "2" "-mthread-model" "posix" "-fmath-errno" "-masm-verbose" "-mconstructor-aliases" "-munwind-tables" "-target-cpu" "x86-64" "-dwarf-column-info" "-debugger-tuning=gdb" "-momit-leaf-frame-pointer" "-v" "-resource-dir" "/usr/lib/clang/8.0.1" "-fdebug-compilation-dir" "/cygdrive/c/my_projects/prj1/Debug" "-ferror-limit" "19" "-fmessage-length" "0" "-fobjc-runtime=gcc" "-fseh-exceptions" "-fdiagnostics-show-option" "-o" "my_files\\my_file1.s" "-x" "ir" "my_files\\my_file1.bc" "-faddrsig" Here is the output without -save-temps, just -###: "/usr/bin/clang-8" "-cc1" "-triple" "x86_64-unknown-windows-cygnus" "-emit-obj" "-mrelax-all" "-disable-free" "-disable-llvm-verifier" "-discard-value-names" "-main-file-name" "my_files\\my_file1.bc" "-mrelocation-model" "pic" "-pic-level" "2" "-mthread-model" "posix" "-fmath-errno" "-masm-verbose" "-mconstructor-aliases" "-munwind-tables" "-target-cpu" "x86-64" "-dwarf-column-info" "-debugger-tuning=gdb" "-momit-leaf-frame-pointer" "-v" "-resource-dir" "/usr/lib/clang/8.0.1" "-fdebug-compilation-dir" "/cygdrive/c/my_projects/prj1/Debug" "-ferror-limit" "19" "-fmessage-length" "0" "-fobjc-runtime=gcc" "-fseh-exceptions" "-fdiagnostics-show-option" "-o" "" "-x" "ir" "my_files\\my_file1.bc" "-faddrsig" So the "-o" "my_files\\my_file1.s" vs "-o" "" seems to be the difference. Is there an explanation? Also, some more output with the output with flags -save-temps, -###: "/usr/bin/ld" "-m" "i386pep" "--wrap" "_Znwm" "--wrap" "_Znam" "--wrap" "_ZnwmRKSt9nothrow_t" "--wrap" "_ZnamRKSt9nothrow_t" "--wrap" "_ZdlPv" "--wrap" "_ZdaPv" "--wrap" "_ZdlPvRKSt9nothrow_t" "--wrap" "_ZdaPvKSt9nothrow_t" "-Bdynamic" "--tsaware" "-o" "myexecutable" "/usr/lib/crt0.o" "/usr/lib/gcc/x86_64-pc-cygwin/10/crtbegin.o" "-LC:/mylibraries" "-L/usr/lib/gcc/x86_64-pc-cygwin/10" "-L/usr/x86_64-pc-cygwin/lib" "-L/usr/lib" "-L/usr/lib/w32api" "my_files\\my_file1.o" "my_files\\my_file2.o" " my_files\\my_file3.o" "-lnaturedsp" "-lgcc_s" "-gcc" "-lcygwin" "-ladvapi32" "-lshell32" "-luser32" "-lkernel32" "/usr/lib/default-manifest.o" "/usr/lib/gcc/x86_64-pc-cygwin/10/crtend.o" and with only -###: "/usr/bin/ld" "-m" "i386pep" "--wrap" "_Znwm" "--wrap" "_Znam" "--wrap" "_ZnwmRKSt9nothrow_t" "--wrap" "_ZnamRKSt9nothrow_t" "--wrap" "_ZdlPv" "--wrap" "_ZdaPv" "--wrap" "_ZdlPvRKSt9nothrow_t" "--wrap" "_ZdaPvKSt9nothrow_t" "-Bdynamic" "--tsaware" "-o" "myexecutable" "/usr/lib/crt0.o" "/usr/lib/gcc/x86_64-pc-cygwin/10/crtbegin.o" "-LC:/mylibraries" "-L/usr/lib/gcc/x86_64-pc-cygwin/10" "-L/usr/x86_64-pc-cygwin/lib" "-L/usr/lib" "-L/usr/lib/w32api" "" "" "" "-lnaturedsp" "-lgcc_s" "-lgcc" "-lcygwin" "-ladvapi32" "-lshell32" "-luser32" "-lkernel32" "/usr/lib/default-manifest.o" "/usr/lib/gcc/x86_64-pc-cygwin/10/crtend.o" So, again "my_files\\my_file1.o" "my_files\\my_file2.o" " my_files\\my_file3.o" is lost and substituted with empty strings "" "" "". Does this info help resolve my problem? Danijel On Thu, Aug 13, 2020 at 8:27 PM David Blaikie <dblai...@gmail.com> wrote: > Oh, sorry, I didn't read the question in detail about how -save-temps > was making things work when they otherwise were not. > > If you run clang with -### it'll show the command lines it's using, > which should show you where it's trying to write the files so you can > change that/make them writable. I'm not sure which variable is used to > influence clang's temporary directory choice, though. > > On Thu, Aug 13, 2020 at 11:22 AM Danijel DOMAZET > <p-danijel.doma...@devialet.com> wrote: > > > > Thanks Fang-rui. > > I still haven't been able to fix the issue, I still use --save-temps, > and that makes linking very slow. > > Why does this error go away when I set --save-temps, any idea?? > > > > > > > > On Thu, Aug 13, 2020 at 7:16 PM Fāng-ruì Sòng <mask...@google.com> > wrote: > >> > >> On Thu, Aug 13, 2020 at 8:59 AM David Blaikie <dblai...@gmail.com> > wrote: > >> > > >> > On Thu, Aug 13, 2020 at 2:59 AM Danijel DOMAZET > >> > <p-danijel.doma...@devialet.com> wrote: > >> > > > >> > > Thanks David. > >> > > Why do you think this could be about current dir? > >> > > Isn't it about TMP (or TEMP or TMPDIR) environment variables? > >> > >> Neither the driver option -save-temps nor the linker option > >> --save-temps (driver option -Wl,--save-temps) respects > >> TMP/TEMP/TMPDIR. > >> The temporary files are saved relative to the current working > >> directory, which can be changed via -working-directory= > >> > >> > Because I ran it locally, and observed that that's where the files > >> > were written to. > >> > > >> > > > >> > > Thanks, > >> > > Danijel Domazet > >> > > > >> > > > >> > > On Thu, Aug 13, 2020 at 12:11 AM David Blaikie <dblai...@gmail.com> > wrote: > >> > >> > >> > >> Looks like it writes the files to the current directory - do you > have > >> > >> permission to access the current directory? > >> > >> > >> > >> On Wed, Aug 12, 2020 at 6:28 AM Danijel DOMAZET via cfe-users > >> > >> <cfe-users@lists.llvm.org> wrote: > >> > >> > > >> > >> > Hi clang users, > >> > >> > I am using Windows10 + Cygwin + Eclipse + LLVM toolchain to > build a C/C++ > >> > >> > project. > >> > >> > > >> > >> > The files compile fine, but linking with `clang++` fails with > multiple > >> > >> > `error: unable to make temporary file: No such file or > directory`. > >> > >> > > >> > >> > clang++ -o test "source1.bc" "source2.bc" "source3.bc" > >> > >> > clang-8: error: unable to make temporary file: No such file > or directory > >> > >> > clang-8: error: unable to make temporary file: No such file > or directory > >> > >> > clang-8: error: unable to make temporary file: No such file > or directory > >> > >> > > >> > >> > Linker generates one error per each object file. > >> > >> > > >> > >> > However, when I add the `-save-temps` option to linker, it works > OK. > >> > >> > > >> > >> > I am launching Eclipse.exe from within Cygwin. I have tried to > set TMP, > >> > >> > TEMP to /temp, /temp/, /cygdrive/c/temp, etc, but nothing worked. > >> > >> > > >> > >> > What could be the problem? > >> > >> > > >> > >> > Thanks, > >> > >> > Danijel Domazet > >> > >> > > >> > >> > > >> > >> > > >> > >> > - Confidential - > >> > >> > _______________________________________________ > >> > >> > cfe-users mailing list > >> > >> > cfe-users@lists.llvm.org > >> > >> > https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users > >> > > > >> > > > >> > > - Confidential - > >> > >> > >> > >> -- > >> 宋方睿 > > > > > > - Confidential - > -- - Confidential -
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