Hi,
I'm manage to link statically all haskell libraries to a dynamically
loadable postgreSQL extension written in haskell using:
SRC_HC_OPTS += -fPIC
SRC_CC_OPTS += -fPIC
in build.mk and passing these options to every package cabal builds:
--ghc-option=-fPIC --ghc-option=-optc-fPIC
I'm using nix but it should work in any environment if you make sure every
package cabal build gets these options (maybe by setting them in
$HOME/.cabal/config?)
HTH,
Alberto
On Tue, Dec 26, 2017 at 9:11 PM, Viacheslav Lotsmanov wrote: Hi there. My actual main goal is to build my own shared library written in
Haskell that would be compatible with application written in C even without
knowing that is is written in Haskell. So for now I compiled my shared
library but I only could dynamically link it to Haskell dependencies such
as "base" and "ghc-prim" packages. But I want to statically link Haskell
dependencies but I realized it isn't simple and straightforward task. On Freenode's #haskell I was advised I should build GHC from scratch with
-fPIC, on the Linux (I'm using Fedora Workstation 25 on x86_64) I couldn't
go forward without this step. So I wrote some Dockerfile based on Debian 9,
skipping first part which is containing 'apt-get update' and installing
'build-essential' here is what I have:
COPY my-build.mk /my-build.mk RUN mkdir /compile && cd /compile \
&& wget https://downloads.haskell.org/~ghc/8.2.2/ghc-8.2.2-src.tar.xz
\
&& tar -xvf ghc-8.2.2-src.tar.xz \
&& rm ghc-8.2.2-src.tar.xz \
&& cd ghc-8.2.2/ \
&& ./configure --prefix=/ghc-8.2.2-fpic --disable-library-profiling
--enable-shared \
&& cp /my-build.mk mk/build.mk \
&& make install \
&& cd /usr/local/bin \
&& ls /ghc-8.2.2-fpic/bin/ | xargs -I{} ln -s /ghc-8.2.2-fpic/bin/{} And as you can see I just use my own prepared *my-build.mk
http://my-build.mk* file which is:
SRC_HC_OPTS = -H64m -O
EXTRA_HC_OPTS = -fPIC
SRC_CC_OPTS = -fPIC -O
GhcStage1HcOpts = -fasm -O0
GhcStage2HcOpts = -fasm -O0
GhcLibHcOpts = -fasm -O2
GhcLibWays = v dyn
DYNAMIC_GHC_PROGRAMS = YES
DYNAMIC_BY_DEFAULT = NO
SplitObjs = NO
HADDOCK_DOCS = NO
BUILD_DOCBOOK_HTML = NO
BUILD_DOCBOOK_PS = NO
BUILD_DOCBOOK_PDF = NO
V = 1
LATEX_DOCS = NO
HSCOLOUR_SRCS = NO
BeConservative = YES I just combined it from parts I found in the internet during searching
answers to my questions. So I built this container, I also installed
dependencies by this commands:
cd /mnt
cabal update
cabal sandbox init
cabal install --enable-shared --ghc-option=-fPIC happy alex
cabal install --enable-shared --ghc-option=-fPIC base-unicode-symbols
filepath process directory lens containers qm-interpolated-string And when I tried to build my app by following commands (first command
compiles some C-code to automatically initialize Haskell runtime, see link
posted below, not sure if *-static*, *-shared* or *-fPIC* means something
here but it's work in progress):
ghc -static -shared -fPIC -optc-DMODULE=Foo src/lib-autoinit.c -outputdir
builddir
ghc -package-db=SOME_CABALS_SANDBOX_PKGDB_DIR --make -static -shared -fPIC
src/Foo.hs builddir/src/lib-autoinit.o -o builddir/libfoo.o -isrc
-outputdir builddir -Wall -O2 I failed with a lot of similar errors like this one:
/usr/bin/ld.gold: error: /ghc-8.2.2-fpic/lib/ghc-8.2.2/
ghc-prim-0.5.1.1/libHSghc-prim-0.5.1.1.a(Classes.o): requires dynamic
R_X86_64_PC32 reloc against 'stg_ap_0_fast' which may overflow at runtime;
recompile with -fPIC What have I missed? What should I do to make this happen? Any progress could be found here (Dockerfile, sources of modules,
build-scripts): https://github.com/unclechu/haskell-experiment-shared-
library-for-c-application
Related stack overflow issue: https://stackoverflow.com/
questions/47978884/how-do-i-recompile-ghc-with-fpic _______________________________________________
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