[WIP] Fix implicit declaration of function 'cblas_idamax'

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>implicit declaration of function 'cblas_idamax'</issue_title>
<issue_description>### Describe the bug

When compile blas_test.v, it will issue warning implicit declaration of function 'cblas_idamax', this should be fixed.

Related to vlang/v#26343
https://github.com/vlang/v/actions/runs/20957079842/job/60224272485?pr=26343

Expected Behavior

no implicit declaration of function 'cblas_idamax' warnings

Current Behavior

$ v vsl/blas/blas_test.v -showcc -keepc -d vsl_blas_cblas  -show-c-output
> C compiler cmd: '/media/HD/github/kbkpbot/v/thirdparty/tcc/tcc.exe' '@/tmp/v_1000/blas_test.tmp.c.rsp'
> C compiler response file "/tmp/v_1000/blas_test.tmp.c.rsp":
  -fwrapv -o "/home/mars/.vmodules/vsl/blas/blas_test" -D GC_THREADS=1 -D GC_BUILTIN_ATOMIC=1 -I "/media/HD/github/kbkpbot/v/thirdparty/libgc/include" -I "/media/HD/github/kbkpbot/v/thirdparty/stdatomic/nix" -O2 -I "/usr/local/include" -I "/usr/lib" -L "/usr/local/lib" -L "/usr/lib" -I "/home/mars/.vmodules/vsl/blas" "/tmp/v_1000/blas_test.tmp.c" -std=c99 -D_DEFAULT_SOURCE -bt25 "/media/HD/github/kbkpbot/v/thirdparty/tcc/lib/libgc.a" -ldl -lpthread -lm -lopenblas
======== Output of the C Compiler (/media/HD/github/kbkpbot/v/thirdparty/tcc/tcc.exe) ========
/tmp/v_1000/blas_test.tmp.c:11572: warning: implicit declaration of function 'cblas_idamax'
/tmp/v_1000/blas_test.tmp.c:11575: warning: implicit declaration of function 'cblas_daxpy'
/tmp/v_1000/blas_test.tmp.c:11578: warning: implicit declaration of function 'cblas_dcopy'
/tmp/v_1000/blas_test.tmp.c:11581: warning: implicit declaration of function 'cblas_dswap'
/tmp/v_1000/blas_test.tmp.c:11584: warning: implicit declaration of function 'cblas_dscal'
/tmp/v_1000/blas_test.tmp.c:11587: warning: implicit declaration of function 'cblas_dgemv'
/tmp/v_1000/blas_test.tmp.c:11590: warning: implicit declaration of function 'cblas_dger'
/tmp/v_1000/blas_test.tmp.c:11593: warning: implicit declaration of function 'cblas_dsyr2k'
/tmp/v_1000/blas_test.tmp.c:11596: warning: implicit declaration of function 'cblas_dtrmm'
/tmp/v_1000/blas_test.tmp.c:11599: warning: implicit declaration of function 'cblas_dtrsm'
/tmp/v_1000/blas_test.tmp.c:11602: warning: implicit declaration of function 'cblas_dgemm'
==============================================================================================

Reproduction Steps

v vsl/blas/blas_test.v -showcc -keepc -d vsl_blas_cblas  -show-c-output

Possible Solution

Fix blas and make sure include "cblas.h"

Additional Information/Context

No response

V version

V 0.5.0 412c7b0368469a8c386ea45e0775abbe780a1929

Version used

current

Environment details (OS name and version, etc.)

V full version	V 0.5.0 412c7b0368469a8c386ea45e0775abbe780a1929
OS	linux, Ubuntu 24.04.3 LTS
Processor	8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz
Memory	11.72GB/15.51GB
V executable	/media/HD/github/kbkpbot/v/v
V last modified time	2026-01-14 06:08:53
V home dir	OK, value: /media/HD/github/kbkpbot/v
VMODULES	OK, value: /home/mars/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	OK, value: /home/mars/.vmodules/vsl/blas
Git version	git version 2.43.0
V git status	weekly.2025.52-185-ge32aa73a-dirty
.git/config present	true
cc version	cc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
gcc version	gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
clang version	Ubuntu clang version 18.1.3 (1ubuntu1)
tcc version	tcc version 0.9.28rc 2025-02-13 HEAD@f8bd136d (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 696c1d84
emcc version	N/A
glibc version	ldd (Ubuntu GLIBC 2.39-0ubuntu8.6) 2.39
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes implicit declaration of function 'cblas_idamax' #231

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