Re: [PATCH 0/3] picolibc: Add picolibc linking help

2022-08-24 Thread Andrew Pinski via Gcc
On Wed, Aug 24, 2022 at 11:12 AM Keith Packard via Gcc-patches wrote: > > Picolibc is a C library for embedded systems based on code from newlib > and avr libc. To connect some system-dependent picolibc functions > (like stdio) to an underlying platform, the platform may provide an OS > library. >

[PATCH 0/3] picolibc: Add picolibc linking help

2022-08-24 Thread Keith Packard via Gcc
Picolibc is a C library for embedded systems based on code from newlib and avr libc. To connect some system-dependent picolibc functions (like stdio) to an underlying platform, the platform may provide an OS library. This OS library must follow the C library in the link command line. In current pi

[PATCH 3/3] picolibc: Add '--oslib=' option when default C library is picolibc

2022-08-24 Thread Keith Packard via Gcc
This option allows targets to insert an OS library after the C library in the LIB_PATH spec file fragment. This library maps a few POSIX APIs used by picolibc to underlying system capabilities. For example, picolibc provides 'libsemihost' on various targets which maps these APIs to semihosting cap

[PATCH 1/3] picolibc: Allow default libc to be specified to configure

2022-08-24 Thread Keith Packard via Gcc
The default C library is normally computed based on the target triplet. However, for embedded systems, it can be useful to leave the triplet alone while changing which C library is used by default. Other C libraries may still be available on the system so the compiler and can be used by specifying

[PATCH 2/3] picolibc: Add newlib and picolibc as default C library choices

2022-08-24 Thread Keith Packard via Gcc
Signed-off-by: Keith Packard --- gcc/config.gcc | 8 +++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/gcc/config.gcc b/gcc/config.gcc index f8b6da4f4e7..0aa4bd6c3dd 100644 --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -639,7 +639,7 @@ case ${target} in esac # Common C libr

Re: Counting static __cxa_atexit calls

2022-08-24 Thread Michael Matz via Gcc
Hello, On Wed, 24 Aug 2022, Florian Weimer wrote: > > On Wed, 24 Aug 2022, Florian Weimer wrote: > > > >> > Isn't this merely moving the failure point from exception-at-ctor to > >> > dlopen-fails? > >> > >> Yes, and that is a soft error that can be handled (likewise for > >> pthread_create). >

Re: Counting static __cxa_atexit calls

2022-08-24 Thread Florian Weimer via Gcc
* Michael Matz: > Hello, > > On Wed, 24 Aug 2022, Florian Weimer wrote: > >> > Isn't this merely moving the failure point from exception-at-ctor to >> > dlopen-fails? >> >> Yes, and that is a soft error that can be handled (likewise for >> pthread_create). > > Makes sense. Though that actually

[RISC-V] [SIG-toolchain] Meeting will be canceled (Agust 25, 2022)

2022-08-24 Thread jiawei
Hi all, Tommorrow's meeting will be canceled, since it during 2022 RISC-V Summit China . The next RISC-V GNU toolchian meeting will be held on Sep 8. Please let me know if you have any topics want to discuss in the next meeting. Best Regards, Jiawei

Re: Counting static __cxa_atexit calls

2022-08-24 Thread Michael Matz via Gcc
Hello, On Wed, 24 Aug 2022, Florian Weimer wrote: > > Isn't this merely moving the failure point from exception-at-ctor to > > dlopen-fails? > > Yes, and that is a soft error that can be handled (likewise for > pthread_create). Makes sense. Though that actually hints at a design problem with

Re: Counting static __cxa_atexit calls

2022-08-24 Thread Florian Weimer via Gcc
* Michael Matz: > Hello, > > On Tue, 23 Aug 2022, Florian Weimer via Gcc wrote: > >> We currently have a latent bug in glibc where C++ constructor calls can >> fail if they have static or thread storage duration and a non-trivial >> destructor. The reason is that __cxa_atexit (and >> __cxa_thread

Re: unreachable intro to gcc page linked to on readings page

2022-08-24 Thread Jonathan Wakely via Gcc
On Sun, 7 Aug 2022 at 09:33, Van Ly via Gcc wrote: > > > Hello, > > On the readings page > > . https://gcc.gnu.org/readings.html > > a broken link points to > > An introduction to GCC by Brian J. Gough. > . http://www.network-theory.co.uk/gcc/intro/ > > which has a copy at > > . > https:/

Re: [PATCH] gcov: fix file and function summary information

2022-08-24 Thread Martin Liška
On 8/24/22 09:12, Jørgen Kvalsvik wrote: > I tested it and get the file summary as expected: > > File 'demo.cc' > Lines executed:84.62% of 26 > Branches executed:100.00% of 6 > Taken at least once:50.00% of 6 > Calls executed:100.00% of 4 > Creating 'demo.cc.gcov' > > Thanks, > Jørgen Great, I'v

Re: [PATCH] gcov: fix file and function summary information

2022-08-24 Thread Jørgen Kvalsvik
On 22/08/2022 21:25, Martin Liška wrote: Patch can bootstrap on x86_64-linux-gnu and survives regression tests. Jorgen: Can you please test it before I'll install it? Thanks, Martin gcc/ChangeLog: * gcov.cc (add_line_counts): Add group functions to coverage summary.