Performing C SOURCE FILE Test RIGHT_SHIFT_IS_UNSIGNED failed with the following compile output:
Change Dir: /var/tmp/portage/media-libs/libjpeg-turbo-2.1.5.1/work/libjpeg-turbo-2.1.5.1_build-abi_x86_64.amd64/CMakeFiles/CMakeScratch/TryCompile-wiQs4o

Run Build Command(s):/usr/bin/ninja cmTC_d43d2 && [1/2] Building C object CMakeFiles/cmTC_d43d2.dir/src.c.o
[2/2] Linking C executable cmTC_d43d2


...and run output:

Return value: 1
Source file was:

      #include <stdio.h>
      #include <stdlib.h>
      int is_shifting_signed (long arg) {
        long res = arg >> 4;
        if (res == -0x7F7E80CL)
          return 1; /* right shift is signed */
        /* see if unsigned-shift hack will fix it. */
        /* we can't just test exact value since it depends on width of long... */
        res |= (~0L) << (32-4);
        if (res == -0x7F7E80CL)
          return 0; /* right shift is unsigned */
        printf("Right shift isn't acting as I expect it to.\n");
        printf("I fear the JPEG software will not work at all.\n\n");
        return 0; /* try it with unsigned anyway */
      }
      int main (void) {
        exit(is_shifting_signed(-0x7F7E80B1L));
      }

Checking whether the ASM_NASM compiler is GNU using "--version" did not match "(GNU assembler)|(GCC)|(Free Software Foundation)":
yasm 1.3.0
Compiled on Mar 10 2023.
Copyright (c) 2001-2014 Peter Johnson and other Yasm developers.
Run yasm --license for licensing overview and summary.
Checking whether the ASM_NASM compiler is Clang using "--version" did not match "(clang version)":
yasm 1.3.0
Compiled on Mar 10 2023.
Copyright (c) 2001-2014 Peter Johnson and other Yasm developers.
Run yasm --license for licensing overview and summary.
Checking whether the ASM_NASM compiler is AppleClang using "--version" did not match "(Apple LLVM version)":
yasm 1.3.0
Compiled on Mar 10 2023.
Copyright (c) 2001-2014 Peter Johnson and other Yasm developers.
Run yasm --license for licensing overview and summary.
Checking whether the ASM_NASM compiler is ARMClang using "--version" did not match "armclang":
yasm 1.3.0
Compiled on Mar 10 2023.
Copyright (c) 2001-2014 Peter Johnson and other Yasm developers.
Run yasm --license for licensing overview and summary.
Checking whether the ASM_NASM compiler is HP using "-V" did not match "HP C":
yasm: warning: unrecognized option `-V'
yasm: No input files specified
Checking whether the ASM_NASM compiler is Intel using "--version" did not match "(ICC)":
yasm 1.3.0
Compiled on Mar 10 2023.
Copyright (c) 2001-2014 Peter Johnson and other Yasm developers.
Run yasm --license for licensing overview and summary.
Checking whether the ASM_NASM compiler is IntelLLVM using "--version" did not match "(Intel[^
]+oneAPI)":
yasm 1.3.0
Compiled on Mar 10 2023.
Copyright (c) 2001-2014 Peter Johnson and other Yasm developers.
Run yasm --license for licensing overview and summary.
Checking whether the ASM_NASM compiler is SunPro using "-V" did not match "Sun C":
yasm: warning: unrecognized option `-V'
yasm: No input files specified
Checking whether the ASM_NASM compiler is XL using "-qversion" did not match "XL C":
yasm: warning: unrecognized option `-qversion'
yasm: No input files specified
Checking whether the ASM_NASM compiler is MSVC using "-?" did not match "Microsoft":
yasm: warning: unrecognized option `-?'
yasm: No input files specified
Checking whether the ASM_NASM compiler is TI using "-h" did not match "Texas Instruments":
usage: yasm [option]* file
Options:
    --version               show version text
    --license               show license text
    -h, --help              show help text
    --arch=<arch>           select architecture (list with -a help)
     -a <arch>
    --parser=<parser>       select parser (list with -p help)
     -p <parser>
    --preproc=<preproc>     select preprocessor (list with -r help)
     -r <preproc>
    --oformat=<format>      select object format (list with -f help)
     -f <format>
    --dformat=<debug>       select debugging format (list with -g help)
     -g <debug>
    --lformat=<list>        select list format (list with -L help)
     -L <list>
    --list=<listfile>       name of list-file output
     -l <listfile>
    --objfile=<filename>    name of object-file output
     -o <filename>
    --mapfile=<filename>    name of map-file output
    --machine=<machine>     select machine (list with -m help)
     -m <machine>
    --force-strict          treat all sized operands as if `strict' was used
    -w                      inhibits warning messages
    -W                      enables/disables warning
    -M                      generate Makefile dependencies on stdout
    -E <file>               redirect error messages to file
    -s                      redirect error messages to stdout
    -e, --preproc-only      preprocess only (writes output to stdout by default)
    -i <path>               add include path
    -I <path>               add include path
    -P <filename>           pre-include file
    -d <macro[=value]>      pre-define a macro, optionally to value
    -D <macro[=value]>      pre-define a macro, optionally to value
    -u <macro>              undefine a macro
    -U <macro>              undefine a macro
    -X <style>              select error/warning message style (`gnu' or `vc')
    --prefix=<prefix>       prepend argument to name of all external symbols
    --suffix=<suffix>       append argument to name of all external symbols
    --postfix=<suffix>      append argument to name of all external symbols

Files are asm sources to be assembled.

Sample invocation:
   yasm -f elf -o object.o source.asm

Report bugs to bug-yasm@tortall.net
Checking whether the ASM_NASM compiler is IAR using "" did not match "IAR Assembler":
yasm: No input files specified
Checking whether the ASM_NASM compiler is ARMCC using "" did not match "(ARM Compiler)|(ARM Assembler)|(Arm Compiler)":
yasm: No input files specified
Checking whether the ASM_NASM compiler is NASM using "-v" did not match "(NASM version)":
yasm: warning: unrecognized option `-v'
yasm: No input files specified
Performing C SOURCE FILE Test JNI_INCLUDE_PATH2_OPTIONAL failed with the following output:
Change Dir: /var/tmp/portage/media-libs/libjpeg-turbo-2.1.5.1/work/libjpeg-turbo-2.1.5.1_build-abi_x86_64.amd64/CMakeFiles/CMakeScratch/TryCompile-05vNkm

Run Build Command(s):/usr/bin/ninja cmTC_e1752 && [1/2] Building C object CMakeFiles/cmTC_e1752.dir/src.c.o
FAILED: CMakeFiles/cmTC_e1752.dir/src.c.o 
/usr/bin/x86_64-pc-linux-gnu-gcc -DJNI_INCLUDE_PATH2_OPTIONAL -I/opt/openjdk-bin-8.362_p09/include  -O2 -pipe -march=native -fno-diagnostics-color  -fno-diagnostics-color -o CMakeFiles/cmTC_e1752.dir/src.c.o -c /var/tmp/portage/media-libs/libjpeg-turbo-2.1.5.1/work/libjpeg-turbo-2.1.5.1_build-abi_x86_64.amd64/CMakeFiles/CMakeScratch/TryCompile-05vNkm/src.c
In file included from /var/tmp/portage/media-libs/libjpeg-turbo-2.1.5.1/work/libjpeg-turbo-2.1.5.1_build-abi_x86_64.amd64/CMakeFiles/CMakeScratch/TryCompile-05vNkm/src.c:2:
/opt/openjdk-bin-8.362_p09/include/jni.h:45:10: fatal error: jni_md.h: No such file or directory
   45 | #include "jni_md.h"
      |          ^~~~~~~~~~
compilation terminated.
ninja: build stopped: subcommand failed.


Source file was:

#include <jni.h>
int main(void) { return 0; }