[PATCH] RISC-V: Use newlib nano specific libm.

[PATCH] RISC-V: Use newlib nano specific libm.

[Jim Wilson]

The libm gamma functions use the _gamma_signgam field of the reentrant
structure, which changes offset with the --enable-newlib-reent-small
configure option, which means we need to use a newlib nano specific
version of libm in addition to libc in the nano.specs file.  Reported
by Keith Packard.  There is a riscv-gnu-toolchain patch that goes
along with this to create the new libm_nano.a file.

Signed-off-by: Jim Wilson <jimw@sifive.com>
---
 libgloss/riscv/nano.specs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libgloss/riscv/nano.specs b/libgloss/riscv/nano.specs
index 89fd23176..e12e31384 100644
--- a/libgloss/riscv/nano.specs
+++ b/libgloss/riscv/nano.specs
@@ -15,7 +15,7 @@
 %(nano_link_gcc_c_sequence) --start-group %G %(nano_libc) %(nano_libgloss) --end-group
 
 *link:
-%(nano_link) %:replace-outfile(-lc -lc_nano) %:replace-outfile(-lg -lg_nano)
+%(nano_link) %:replace-outfile(-lc -lc_nano) %:replace-outfile(-lg -lg_nano) %:replace-outfile(-lm -lm_nano)
 
 *lib:
 %{!shared:%{g*:-lg_nano} %{!p:%{!pg:-lc_nano}}%{p:-lc_p}%{pg:-lc_p}}
-- 
2.17.1

Re: [PATCH] RISC-V: Use newlib nano specific libm.

[Corinna Vinschen]

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On Jan 29 14:46, Jim Wilson wrote:
> The libm gamma functions use the _gamma_signgam field of the reentrant
> structure, which changes offset with the --enable-newlib-reent-small
> configure option, which means we need to use a newlib nano specific
> version of libm in addition to libc in the nano.specs file.  Reported
> by Keith Packard.  There is a riscv-gnu-toolchain patch that goes
> along with this to create the new libm_nano.a file.
> 
> Signed-off-by: Jim Wilson <jimw@sifive.com>
> ---
>  libgloss/riscv/nano.specs | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libgloss/riscv/nano.specs b/libgloss/riscv/nano.specs
> index 89fd23176..e12e31384 100644
> --- a/libgloss/riscv/nano.specs
> +++ b/libgloss/riscv/nano.specs
> @@ -15,7 +15,7 @@
>  %(nano_link_gcc_c_sequence) --start-group %G %(nano_libc) %(nano_libgloss) --end-group
>  
>  *link:
> -%(nano_link) %:replace-outfile(-lc -lc_nano) %:replace-outfile(-lg -lg_nano)
> +%(nano_link) %:replace-outfile(-lc -lc_nano) %:replace-outfile(-lg -lg_nano) %:replace-outfile(-lm -lm_nano)
>  
>  *lib:
>  %{!shared:%{g*:-lg_nano} %{!p:%{!pg:-lc_nano}}%{p:-lc_p}%{pg:-lc_p}}
> -- 
> 2.17.1

Pushed.


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer
Red Hat

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