Can't build benchmarks

[kuk0]

When trying to build benchmarks, I get a linker error, as the cbits.c from the text i have installed clash with the cbits.c from the text source code i'm currently working on and which i'm trying to benchmark.

Linking dist/build/text-benchmarks/text-benchmarks ...
/home/kuko/.cabal/lib/x86_64-linux-ghc-8.0.2/text-1.2.2.2-KC7dWoG09dA1F6jKj5GSqh/libHStext-1.2.2.2-KC7dWoG09dA1F6jKj5GSqh.a(cbits.o): In function `_hs_text_memcmp':
(.text+0x20): multiple definition of `_hs_text_memcmp'
dist/build/text-benchmarks/text-benchmarks-tmp/../cbits/cbits.o:cbits.c:(.text+0x0): first defined here
/home/kuko/.cabal/lib/x86_64-linux-ghc-8.0.2/text-1.2.2.2-KC7dWoG09dA1F6jKj5GSqh/libHStext-1.2.2.2-KC7dWoG09dA1F6jKj5GSqh.a(cbits.o): In function `_hs_text_decode_utf8_state':
(.text+0xe0): multiple definition of `_hs_text_decode_utf8_state'
dist/build/text-benchmarks/text-benchmarks-tmp/../cbits/cbits.o:cbits.c:(.text+0x20): first defined here
/home/kuko/.cabal/lib/x86_64-linux-ghc-8.0.2/text-1.2.2.2-KC7dWoG09dA1F6jKj5GSqh/libHStext-1.2.2.2-KC7dWoG09dA1F6jKj5GSqh.a(cbits.o): In function `_hs_text_decode_utf8':
(.text+0x2a0): multiple definition of `_hs_text_decode_utf8'
dist/build/text-benchmarks/text-benchmarks-tmp/../cbits/cbits.o:cbits.c:(.text+0x150): first defined here
collect2: error: ld returned 1 exit status

The problem is, that criterion has text as a dependency.

Currently, as a workaround, I just rename the functions in cbits.c, then cabal build just works.

• Is there a better solution?
• If not, I can send a PR adding a compilation flag and do the renaming, so cabal build just works.
• Is this related to Handle apparent package dependency cycles due to test suites / benchmarks cabal#1575 ?

[hvr]

@kuk0 actually I might have a way to have cbits symbols automatically mangled uniquely for each package... lemme try something

[ethercrow]

This was fixed by migrating from criterion to tasty-bench.