BUILD: improved configure status reporting

[ikryukov]

What

Improved configuration process and detection
Example: vLLM image ships without nvml and it was hard to debug why the CUDA is not working + NVLS were enabled in that case

Why ?

• Clearer feedback - users immediately understand why TL CUDA is disabled
• Faster builds when NVML is missing - skips unnecessary NVCC architecture generation

[greptile-apps]

Greptile Summary

improved configuration status reporting to provide clearer feedback when NVML is missing and TL CUDA cannot be enabled

Key improvements:

• provides early warning when NVML headers/library missing, explaining why TL CUDA disabled
• skips expensive NVCC architecture generation when TL CUDA unavailable (optimization for environments like vLLM without NVML)
• adds detailed status messages throughout configuration process

Critical issue:

• src/components/tl/cuda/configure.m4 contains invalid AS_IF syntax at lines 21-25 that will cause autoconf parsing errors

Confidence Score: 1/5

• this PR contains a critical syntax error that will break the build configuration
• the AS_IF macro usage at lines 21-25 in src/components/tl/cuda/configure.m4 has invalid m4 syntax - attempting to chain multiple test conditions as separate arguments rather than using nested AS_IF for elif logic. this will cause autoconf to fail or produce incorrect configure scripts. the rest of the changes are good improvements for status reporting
• pay close attention to src/components/tl/cuda/configure.m4 - contains syntax error that must be fixed

Important Files Changed

Filename	Overview
config/m4/cuda.m4	improved NVML detection feedback and conditionally skips expensive NVCC gencode generation when TL CUDA unavailable
src/components/tl/cuda/configure.m4	added detailed status messages but contains critical AS_IF syntax error that will break autoconf

[greptile-apps]

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[ikryukov]

/build

[greptile-apps]

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[Sergei-Lebedev]

/build

[greptile-apps]

Additional Comments (1)

1. src/components/tl/cuda/configure.m4, line 21-25 (link)

   syntax: incorrect AS_IF syntax - autoconf will not parse this correctly

   AS_IF takes 3 arguments: condition, then-action, else-action. this code attempts to chain multiple test conditions which is invalid m4 syntax. needs nested AS_IF for elif logic

   also added quotes around variables to match codebase style in config/m4/cuda.m4

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