[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 --- Comment #9 from GCC Commits --- The releases/gcc-11 branch has been updated by Iain D Sandoe : https://gcc.gnu.org/g:3bb14f6ed5bc70e25381c67963c90eaab91eca22 commit r11-11353-g3bb14f6ed5bc70e25381c67963c90eaab91eca22 Author: Iain Sandoe Date: Sun May 29 16:14:32 2022 +0100 Darwin: Fix empty g++ command lines [PR105599]. An empty g++ command line should produce a diagnostic that there are no inputs. The PR is that currently Darwin produces a dignostic about missing link items instead - this is because (errnoeously), for this driver, we are creating a link job for empty command lines. The problem occurs in four stages: The g++ driver appends -shared-libgcc to the command line. The Darwin driver_init code in the backend does not see this (it sees an empty command line). When the back end driver code driver sees an empty command line, it does not add any supplementary flags (e.g. asm-macosx-version-min) - precisely to avoid anything being claimed as an input_file and therefore triggering a link line. Since we do not have a value for asm-macosx-version-min when processing the driver specs, we unconditionally inject 'multiply_defined suppress' which is used with shared libgcc (but only intended on very old Darwin). This then causes the generation of a link job. The solution, for the present, is to move version-specific link params to the LINK_SPEC so that they are only processed when a link job has already been decided. Signed-off-by: Iain Sandoe PR target/105599 gcc/ChangeLog: * config/darwin.h: Move versions-specific handling of multiply_defined from SUBTARGET_DRIVER_SELF_SPECS to LINK_SPEC. (cherry picked from commit 794737976b9a6418eab817f143bb4eb2d0c834d2)
[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 Iain Sandoe changed: What|Removed |Added Resolution|--- |FIXED Status|NEW |RESOLVED --- Comment #8 from Iain Sandoe --- fixed for affected open branches
[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 --- Comment #7 from CVS Commits --- The releases/gcc-11 branch has been updated by Iain D Sandoe : https://gcc.gnu.org/g:a8307cfd66d29efae9c28f5b32bd677398c92dfe commit r11-10780-ga8307cfd66d29efae9c28f5b32bd677398c92dfe Author: Iain Sandoe Date: Sun May 29 16:14:32 2022 +0100 Darwin: Fix empty g++ command lines [PR105599]. An empty g++ command line should produce a diagnostic that there are no inputs. The PR is that currently Darwin produces a dignostic about missing link items instead - this is because (errnoeously), for this driver, we are creating a link job for empty command lines. The problem occurs in four stages: The g++ driver appends -shared-libgcc to the command line. The Darwin driver_init code in the backend does not see this (it sees an empty command line). When the back end driver code driver sees an empty command line, it does not add any supplementary flags (e.g. asm-macosx-version-min) - precisely to avoid anything being claimed as an input_file and therefore triggering a link line. Since we do not have a value for asm-macosx-version-min when processing the driver specs, we unconditionally inject 'multiply_defined suppress' which is used with shared libgcc (but only intended on very old Darwin). This then causes the generation of a link job. The solution, for the present, is to move version-specific link params to the LINK_SPEC so that they are only processed when a link job has already been decided. Signed-off-by: Iain Sandoe PR target/105599 gcc/ChangeLog: * config/darwin.h: Move versions-specific handling of multiply_defined from SUBTARGET_DRIVER_SELF_SPECS to LINK_SPEC. (cherry picked from commit 794737976b9a6418eab817f143bb4eb2d0c834d2)
[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 --- Comment #6 from Iain Sandoe --- needed on 11.x
[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 --- Comment #5 from CVS Commits --- The releases/gcc-12 branch has been updated by Iain D Sandoe : https://gcc.gnu.org/g:58c0bc2b62cdbbe9d9677b448fe52a8c54044276 commit r12-8484-g58c0bc2b62cdbbe9d9677b448fe52a8c54044276 Author: Iain Sandoe Date: Sun May 29 16:14:32 2022 +0100 Darwin: Fix empty g++ command lines [PR105599]. An empty g++ command line should produce a diagnostic that there are no inputs. The PR is that currently Darwin produces a dignostic about missing link items instead - this is because (errnoeously), for this driver, we are creating a link job for empty command lines. The problem occurs in four stages: The g++ driver appends -shared-libgcc to the command line. The Darwin driver_init code in the backend does not see this (it sees an empty command line). When the back end driver code driver sees an empty command line, it does not add any supplementary flags (e.g. asm-macosx-version-min) - precisely to avoid anything being claimed as an input_file and therefore triggering a link line. Since we do not have a value for asm-macosx-version-min when processing the driver specs, we unconditionally inject 'multiply_defined suppress' which is used with shared libgcc (but only intended on very old Darwin). This then causes the generation of a link job. The solution, for the present, is to move version-specific link params to the LINK_SPEC so that they are only processed when a link job has already been decided. Signed-off-by: Iain Sandoe PR target/105599 gcc/ChangeLog: * config/darwin.h: Move versions-specific handling of multiply_defined from SUBTARGET_DRIVER_SELF_SPECS to LINK_SPEC. (cherry picked from commit 794737976b9a6418eab817f143bb4eb2d0c834d2)
[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 --- Comment #4 from CVS Commits --- The master branch has been updated by Iain D Sandoe : https://gcc.gnu.org/g:794737976b9a6418eab817f143bb4eb2d0c834d2 commit r13-818-g794737976b9a6418eab817f143bb4eb2d0c834d2 Author: Iain Sandoe Date: Sun May 29 16:14:32 2022 +0100 Darwin: Fix empty g++ command lines [PR105599]. An empty g++ command line should produce a diagnostic that there are no inputs. The PR is that currently Darwin produces a dignostic about missing link items instead - this is because (errnoeously), for this driver, we are creating a link job for empty command lines. The problem occurs in four stages: The g++ driver appends -shared-libgcc to the command line. The Darwin driver_init code in the backend does not see this (it sees an empty command line). When the back end driver code driver sees an empty command line, it does not add any supplementary flags (e.g. asm-macosx-version-min) - precisely to avoid anything being claimed as an input_file and therefore triggering a link line. Since we do not have a value for asm-macosx-version-min when processing the driver specs, we unconditionally inject 'multiply_defined suppress' which is used with shared libgcc (but only intended on very old Darwin). This then causes the generation of a link job. The solution, for the present, is to move version-specific link params to the LINK_SPEC so that they are only processed when a link job has already been decided. Signed-off-by: Iain Sandoe PR target/105599 gcc/ChangeLog: * config/darwin.h: Move versions-specific handling of multiply_defined from SUBTARGET_DRIVER_SELF_SPECS to LINK_SPEC.
[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 Iain Sandoe changed: What|Removed |Added Status|UNCONFIRMED |NEW Last reconfirmed||2022-05-13 Ever confirmed|0 |1 --- Comment #3 from Iain Sandoe --- gcc version 12.0.1 20220429 (prerelease) [gcc-12-1rc1 revision r12-8321-g621650f64fb6] (GCC) gcc-12-1-darwin mini-07-cat:gcc-git-12 isandoe$ /opt/iains/x86_64-apple-darwin19/gcc-12-1rc1/bin/gcc gcc: fatal error: no input files compilation terminated. $ /opt/iains/x86_64-apple-darwin19/gcc-12-1rc1/bin/g++ ld: -rpath can only be used when targeting Mac OS X 10.5 or later collect2: error: ld returned 1 exit status So, we have some addition to the command line from the g++ driver that is causing this (the actual reported problem is not significant, the reason is that the command line is not being seen as empty by the darwin driver)
[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 --- Comment #2 from Iain Sandoe --- hmm .. that issue had been found and fixed, I will have to check what happened.
[Bug target/105599] g++ by itself is not producing "fatal error: no input files" for darwin target
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105599 Andrew Pinski changed: What|Removed |Added Component|c++ |target Keywords||diagnostic Summary|g++ binary: undefined |g++ by itself is not |symbols _main referenced|producing "fatal error: no |from __start in crt1.0 |input files" for darwin ||target Target||x86_64-darwin* Severity|normal |trivial --- Comment #1 from Andrew Pinski --- On Linux this produces: apinski@xeond:~/src/p4/octeontxkpu$ ~/upstream-gcc/bin/g++ g++: fatal error: no input files compilation terminated. So it is a darwin specific issue but it is a minor one as it is just a diagnostic issue with invalid invocation anyways.
