Source: mit-scheme Version: 12.1-7 Tags: ftbfs mit-scheme 12.1-6 builds ok on Ubuntu 26.10. But 12.1-7 (and 12.1-2) do not.
I see that there were some significant build system changes in https://salsa.debian.org/debian/mit-scheme/-/commit/9997d4431c3051 and I haven't tried isolating those changes to determine which patch or config is responsible. I see -Werror=lto-type-mismatch in the build log excerpt. Ubuntu build with LTO enabled by default but Debian doesn't. If that's the cause, then you could reproduce by adding this to the end of your DEB_BUILD_MAINT_OPTIONS line: optimize=+lto Build log excerpt ------------------------ tterm.c:72:15: error: type of ‘tparam’ does not match original declaration [-Werror=lto-type-mismatch] 72 | extern char * tparam (const char *, void *, int, ...); | ^ terminfo.c:38:1: note: types have different parameter counts 38 | tparam (const char * string, | ^ terminfo.c:38:1: note: ‘tparam’ was previously declared here sysprim.c:37:13: error: type of ‘OS_set_trap_state’ does not match original declaration [-Werror=lto-type-mismatch] 37 | extern long OS_set_trap_state (long); | ^ uxtrap.c:143:1: note: return value type mismatch 143 | OS_set_trap_state (enum trap_state state) | ^ uxtrap.c:143:1: note: type ‘trap_state’ should match type ‘long int’ uxtrap.c:143:1: note: ‘OS_set_trap_state’ was previously declared here uxtrap.c:143:1: note: code may be misoptimized unless ‘-fno-strict-aliasing’ is used lto1: all warnings being treated as errors lto-wrapper: fatal error: x86_64-linux-gnu-gcc returned 1 exit status compilation terminated. /usr/bin/x86_64-linux-gnu-ld.bfd: error: lto-wrapper failed collect2: error: ld returned 1 exit status make[6]: *** [Makefile:621: scheme] Error 1 rm cmpauxmd.s Build log ------------ https://launchpad.net/~jbicha/+archive/ubuntu/arch/+build/33802534 https://launchpad.net/~jbicha/+archive/ubuntu/arch/+build/33802535 Thank you, Jeremy Bícha
