Hi, I've upgraded my compiler to GCC 5.2 and pandoc failed to compile. I tried to downgrade to GCC 4.9 via package.env and found out that even though temp/environment shows correct values in CC and CXX temp/build.log still shows GCC 5.2. I tried to dig into the compilation process and discovered that work/setup accepts --with-gcc argument. After setting this argument to gcc-4.9.3 pandoc really compiled with gcc-4.9.3 Reproducible: Always Expected Results: app-text/pandoc-1.12.1-r1
Yes, ghc currently uses gcc from 'ghc --info' (usually ${CTARGET}-gcc). It should be possible to set nonstandard gcc by --with-gcc= flag. I'll try to experiment with it in ::haskell overlay first.
This looks like the right symptom, current "effect" is broken pandoc deps. I only had a few Haskell packages installed, "emerge pandoc" wants to install 100+ Haskell deps and upgrade everything. About halfway through it fails and I get the "please run haskell-updater" error. Running haskell-upater fails some time later with the same error message (ie, please run haskell-updater). Right now it is stuck on dev-haskell/network in the above error loop; since it doesn't respect CC/CFLAGS on the cli, I had to modify some environment stuff to get this far: # cat /etc/portage/env/cabal-extra.conf CABAL_EXTRA_CONFIGURE_FLAGS="--with-cc=x86_64-pc-linux-gnu-gcc" but it just fails later running haskell-updater: ... * ghc-pkg check: 'checking for other broken packages:' * Detected outdated packages: dev-haskell/convertible:0 dev-haskell/hdbc:2 * ERROR: dev-haskell/network-2.6.2.1::gentoo failed (configure phase): * //==-- Please, run 'haskell-updater' to fix outdated packages --==// and fails the same way on convertible and hdbc: # haskell-updater -u --no-deep Running haskell-updater-1.2.9 using GHC 7.10.2 * Executable: /usr/bin/ghc * Library directory: /usr/lib64/ghc-7.10.2 * Package manager (PM): portage Searching for packages installed with a different version of GHC. Found the following old packages: * dev-haskell/convertible:0 * dev-haskell/hdbc:2 emerge --oneshot --keep-going --complete-graph --quiet dev-haskell/convertible:0 dev-haskell/hdbc:2 * IMPORTANT: 2 news items need reading for repository 'gentoo'. * Use eselect news read to view new items. >>> Verifying ebuild manifests >>> Emerging (1 of 2) dev-haskell/convertible-1.1.0.0-r1::gentoo >>> Failed to emerge dev-haskell/convertible-1.1.0.0-r1, Log file: >>> '/var/log/portage/dev-haskell:convertible-1.1.0.0-r1:20151008-212835.log' *** Resuming merge... * emerge --keep-going: dev-haskell/hdbc-2.4.0.1 dropped because it requires * >=dev-haskell/convertible-1.1.0.0:=, >=dev-haskell/convertible-1.1.0.0:= * Error messages for package dev-haskell/convertible-1.1.0.0-r1: What's the workaround for this? Do I need a live chicken?
Answer: 1) remove old stuff manually, haskell-network fails 2) configure this: in /etc/portage/package.env/x86_64-pc-linux-gnu: dev-lang/ghc cabal-extra.conf plain-flags.conf dev-haskell/network plain-flags.conf and in /etc/portage/env/{cabal-extra.conf,plain-flags.conf} cabal-extra.conf: CABAL_EXTRA_CONFIGURE_FLAGS="--with-compiler=/usr/bin/x86_64-pc-linux-gnu-gcc" plain-flags.conf: CC="x86_64-pc-linux-gnu-gcc" CXX="x86_64-pc-linux-gnu-g++" LD="x86_64-pc-linux-gnu-ld" CFLAGS="-march=athlon64 -mtune=amdfam10 -O2 -pipe" CXXFLAGS="${CFLAGS}" LDFLAGS="-Wl,-O1 -Wl,--as-needed" 3) rebuild ghc, then restart emerge pandoc and haskell-network builds (and it even keeps going...)
I agree haskell stuff does not respect CC/CXX but it should not make packages fail. Do you have build.log with a package failure at hand? > CABAL_EXTRA_CONFIGURE_FLAGS="--with-compiler=/usr/bin/x86_64-pc-linux-gnu-gcc" --with-compiler requires haskell compiler, you likley need a --with-gcc=.
It makes packages fail when gcc doesn't support the CFLAGS a user provides.
Finally tried to reproduce it today. The first prerequisite for build failure is presence of .c or .c++ files in haskell package. One of them is dev-haskell/re2 (overlay only), but there should be C-based packages as well, like network. My reproducer is: $ CC=clang CFLAGS=-fheinous-gnu-extensions HCFLAGS="-O0" emerge -1 dev-haskell/re2 Dependency vector -any: using vector-0.11.0.0 x86_64-pc-linux-gnu-gcc: error: unrecognized command line option ‘-fheinous-gnu-extensions’ That sounds about right. There is at least 2 places where compilers can be tweaked: - Cabal's --with-gcc= option (cabal's side .hsc -> .hs preprocessor) - GHC's owh overrides -pgmc/l/a Using comething like that in make.conf should workaround it: HCFLAGS="-pgmc${CC} -pgma${CC} -pgml${CC}" I'll try to plumb the same via haskell-cabal.eclass.
> Using comething like that in make.conf should workaround it: > > HCFLAGS="-pgmc${CC} -pgma${CC} -pgml${CC}" > > I'll try to plumb the same via haskell-cabal.eclass. This change tried to apply it but GHC is not designed to use these options that way. It breaks all the default compiler flags recorded at ghc build time. diff --git a/eclass/ghc-package.eclass b/eclass/ghc-package.eclass index 5466c0b..9824d13 100644 --- a/eclass/ghc-package.eclass +++ b/eclass/ghc-package.eclass @@ -14 +14 @@ -inherit versionator +inherit toolchain-funcs versionator @@ -29,0 +30,14 @@ ghc-getghcpkg() { +# @FUNCTION: ghc-tcflags +# @DESCRIPTION: +# Function returns tool-chain-specific flags. +# Currently only C compiler override for ghc. +ghc-tcflags() { + local cc=$(tc-getCC) + local tcflags=( + -pgmc"${cc}" # C compiler + -pgma"${cc}" # assembler (via compiler) + -pgml"${cc}" # linker (via compiler) + ) + echo "${tcflags[@]}" +} + diff --git a/eclass/haskell-cabal.eclass b/eclass/haskell-cabal.eclass index 4d338d1..392623d 100644 --- a/eclass/haskell-cabal.eclass +++ b/eclass/haskell-cabal.eclass @@ -221 +221 @@ cabal-bootstrap() { - ${HCFLAGS} \ + $(ghc-tcflags) ${HCFLAGS} \ @@ -374 +374 @@ cabal-configure() { - for option in ${HCFLAGS} + for option in $(ghc-tcflags) ${HCFLAGS} The changes in re2 before- and after- build.log: -x86_64-pc-linux-gnu-gcc -fno-stack-protector -DTABLES_NEXT_TO_CODE -Idist/build/autogen -Idist/build -Ithird-party/re2-20140304/ -fPIC -U__PIC__ -D__PIC__ -xassembler -c /tmp/portage/dev-haskell/re2-0.1/temp/ghc22376_0/ghc_1.s -o dist/build/cbits/haskell-re2.o +x86_64-pc-linux-gnu-gcc -Idist/build/autogen -Idist/build -Ithird-party/re2-20140304/ -fPIC -U__PIC__ -D__PIC__ -x assembler -c /tmp/portage/dev-haskell/re2-0.1/temp/ghc1760_0/ghc_1.s -o dist/build/cbits/haskell-re2.o here we've lost 2 default flags: -fno-stack-protector -DTABLES_NEXT_TO_CODE
