Re: pkg/60301: libjpeg-turbo version 3.1.4.1 doesn't build on amiga

The following reply was made to PR pkg/60301; it has been noted by GNATS.

From: "S.P.Zeidler" <[email protected]>
To: [email protected]
Cc: 
Subject: Re: pkg/60301: libjpeg-turbo version 3.1.4.1 doesn't build on amiga
Date: Sat, 30 May 2026 19:32:38 +0000

 Hi Thomas,
 
 Thus wrote Thomas Klausner via gnats ([email protected]):
 
 >  There is a very extensive code in simd/CMakeLists.txt that handles a
 >  lot of platforms.
 
 3.1.4.1 has:
 # grep CPU_TYPE work/libjpeg-turbo-3.1.4.1/simd/CMakeLists.txt
 if(CPU_TYPE STREQUAL "x86_64" OR CPU_TYPE STREQUAL "i386")
 if(CPU_TYPE STREQUAL "x86_64")
 elseif(CPU_TYPE STREQUAL "i386")
 if(CPU_TYPE STREQUAL "x86_64")
 elseif(CPU_TYPE STREQUAL "i386")
 if(CPU_TYPE STREQUAL "x86_64" AND CMAKE_ASM_NASM_OBJECT_FORMAT MATCHES "^elf")
 set(CMAKE_ASM_NASM_FLAGS "${CMAKE_ASM_NASM_FLAGS} -I\"${CMAKE_CURRENT_SOURCE_DIR}/nasm/\" -I\"${CMAKE_CURRENT_SOURCE_DIR}/${CPU_TYPE}/\"")
 if(CPU_TYPE STREQUAL "x86_64")
     string(REGEX REPLACE "${CPU_TYPE}/" "" filename ${file})
   add_library(simd OBJECT ${CPU_TYPE}/jsimd.c)
   add_library(simd OBJECT ${SIMD_SOURCES} ${CPU_TYPE}/jsimd.c)
 elseif(CPU_TYPE STREQUAL "arm64" OR CPU_TYPE STREQUAL "arm")
   if(CPU_TYPE STREQUAL "arm")
 elseif(CPU_TYPE STREQUAL "mips" OR CPU_TYPE STREQUAL "mipsel")
 elseif(CPU_TYPE STREQUAL "loongson" OR CPU_TYPE MATCHES "^mips64")
 elseif(CPU_TYPE STREQUAL "powerpc")
 endif() # CPU_TYPE
 
 so my guess is that x86_64, i386, arm64, arm, mips, mipsel, loongson,
 variants of mips64 and powerpc will work.
 I'm trying a build on sparc64 to verify that that will also fail;
 it's currently slogging through dependencies and will be a while.
 
 make configure on amiga yields:
 CMake Warning at simd/CMakeLists.txt:5 (message):
   SIMD extensions not available for this CPU (m68k).  Performance will
   suffer.
 Call Stack (most recent call first):
   simd/CMakeLists.txt:567 (simd_fail)
 
 >  you can add something like
 >  
 >  .if ${MACHINE_ARCH} == m68k
 >  CMAKE_CONFIGURE_ARGS+=  -DWITH_SIMD=FALSE
 >  .endif
 >  
 >  to disable SIMD detection/support.
 
 I used CMAKE_CONFIGURE_ARGS+=  -DWITH_SIMD=0 after I found the hint to do
 that in README.md, and it builds then.
 
 Comparing to 3.1.3 on amiga:
 make configure also yields:
 CMake Warning at simd/CMakeLists.txt:5 (message):
   SIMD extensions not available for this CPU (m68k).  Performance will
   suffer.
 Call Stack (most recent call first):
   simd/CMakeLists.txt:539 (simd_fail)
 
 and simd/CMakeLists.txt isn't a lot different. There is nothing about m68k
 or amiga in there. Perhaps you remebered a rather earlier version?
 
 Anyhow, building 3.1.3 works:
 work/libjpeg-turbo-3.1.3/cmake-pkgsrc-build/Makefile contains no entries
 regarding simd, wheras the 3.1.4.1 version has:
 # Build rule for target.
 simdcoverage: cmake_check_build_system
         $(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 simdcoverage
 .PHONY : simdcoverage
 
 # fast build rule for target.
 simdcoverage/fast:
         $(MAKE) $(MAKESILENT) -f simd/CMakeFiles/simdcoverage.dir/build.make simd/CMakeFiles/simdcoverage.dir/build
 .PHONY : simdcoverage/fast
 
 simdcoverage seems to be new in 3.1.4(.1) and seems to be not sufficiently
 exempt from building on non-simd CPU architectures.
 
 regards,
 	spz