3rdparty: libjpeg-turbo: CI has failed if NASM is missing.

[Kumataro]

System Information

OpenCV version: 4.x ( 4.10.0-ore )
Operating System / Platform: Ubuntu 24.04
Compiler & compiler version: GCC 12.3.0

Detailed description

Maybe this issue affects the 4.10 release as well, so I've raised it.

After #25623 , libjpeg-turbo 3.0.3 is available with SIMD technology.
For x86-64 or i386 environment, libjpeg-turbo requests NASM(or Yasm).
Unfortunally CI envieonment for Win64(and doc) has not been installed NASM.
So it seems that CI has been failed.

https://pullrequest.opencv.org/buildbot/builders/precommit_windows64/builds/105632/steps/cmake/logs/stdio

-- libjpeg-turbo: VERSION = 3.0.3, BUILD = opencv-4.10.0-pre-libjpeg-turbo
-- Check size of size_t
-- Check size of size_t - done
-- Check size of unsigned long
-- Check size of unsigned long - done
-- Looking for include file intrin.h
-- Looking for include file intrin.h - found
-- Looking for a ASM_NASM compiler
-- Looking for a ASM_NASM compiler - NOTFOUND
-- Looking for assert.h
CMake Warning at 3rdparty/libjpeg-turbo/src/simd/CMakeLists.txt:5 (message):
  SIMD extensions disabled: could not find NASM compiler.  Performance will
  suffer.
Call Stack (most recent call first):
  3rdparty/libjpeg-turbo/src/simd/CMakeLists.txt:48 (simd_fail)


-- Looking for assert.h - found
-- Looking for fcntl.h

This Warning comes from the CMakefile included in the libjpeg-turbo code.

opencv/3rdparty/libjpeg-turbo/src/simd/CMakeLists.txt

Lines 44 to 50 in 1fa96b1

	if(NOT REQUIRE_SIMD)
	include(CheckLanguage)
	check_language(ASM_NASM)
	if(NOT CMAKE_ASM_NASM_COMPILER)
	simd_fail("SIMD extensions disabled: could not find NASM compiler")
	return()
	endif()

opencv/3rdparty/libjpeg-turbo/src/simd/CMakeLists.txt

Lines 1 to 8 in 1fa96b1

	macro(simd_fail message)
	if(REQUIRE_SIMD)
	message(FATAL_ERROR "${message}.")
	else()
	message(WARNING "${message}. Performance will suffer.")
	set(WITH_SIMD 0 PARENT_SCOPE)
	endif()
	endmacro()

We do not want to modify third party source code on this repository directly. So Ithink it is hard to make any patch.

Steps to reproduce

sudo apt remove nasm yasm -y # To make same condition as problem.
git clone <OpenCV>
cmake -S opencv -B build -DBUILD_JPEG=ON

Issue submission checklist

• I report the issue, it's not a question
• I checked the problem with documentation, FAQ, open issues, forum.opencv.org, Stack Overflow, etc and have not found any solution
• I updated to the latest OpenCV version and the issue is still there
• There is reproducer code and related data files (videos, images, onnx, etc)