@OUTPUT@ is not being replaced in custom_target

[SirNate0]

Describe the bug @OUTPUT@ is not being replaced in custom_target. When I build, I see gcc -S -O3 -std=c++20 -fverbose-asm ../sinetest.cpp && llvm-mca-14 @OUTPUT@ -timeline printed to the console and not gcc -S -O3 -std=c++20 -fverbose-asm ../sinetest.cpp && llvm-mca-14 sinetest.s -timeline

To Reproduce

project('foobar', 'cpp', default_options : ['cpp_std=c++20'])

custom_target('sinetest',output:'sinetest.s',input:'sinetest.cpp',command:['bash','-c','echo gcc -S -O3 -std=c++20 -fverbose-asm @INPUT@ "&&" llvm-mca-14 @OUTPUT@ -timeline'],build_by_default:true)

Expected behavior @OUTPUT@ is replaced with the output file sinetest.s.

system parameters

• native build
• Kubuntu 22.04
• Python 3.10.12
• Meson 0.61.2
• Ninja 1.10.1

[dcbaker]

My suspicion is that we don't expect @OUTPUT@ and @INPUT@ to appear in a single string.