I have an FFI program which compiles fine with GHC 6.2.1 under standard compilation options (i.e. no optimisation etc), but not with -O2 or -prof. With -prof/-O2 GHC compiles via C, and this seems to be causing the problem. With -prof I get these error messages: Compiling Database.Oracle.OCIFunctions ( ./Database/Oracle/OCIFunctions.lhs, ./Database/Oracle/OCIFunctions.o ) C:/TEMP/ghc202.hc:5:17: oci.h: No such file or directory C:/TEMP/ghc202.hc: In function `r2Zg_entry': C:/TEMP/ghc202.hc:133: warning: implicit declaration of function `OCIStmtFetch' C:/TEMP/ghc202.hc: In function `r2Zi_entry': C:/TEMP/ghc202.hc:337: warning: implicit declaration of function `OCIStmtExecute' ...etc... With -O2 I get these: Compiling Database.Oracle.OCIFunctions ( ./Database/Oracle/OCIFunctions.lhs, ./Database/Oracle/OCIFunctions.o ) C:/TEMP/ghc311.hc:5:17: oci.h: No such file or directory C:/TEMP/ghc311.hc: In function `DatabaseziOracleziOCIFunctions_zdwccall_entry': C:/TEMP/ghc311.hc:1295: warning: implicit declaration of function `OCIStmtFetch' C:/TEMP/ghc311.hc: In function `DatabaseziOracleziOCIFunctions_zdwccall1_entry': C:/TEMP/ghc311.hc:1480: warning: implicit declaration of function `OCIStmtExecute' ...etc... I've used these command line options for normal (no -prof or -O) compilation: -Lc:\orant817\bin -loci The "oci.h" file in question is located in c:\orant817\oci\include, and oci.dll is located in c:\orant817\bin. When I compiled with -prof I tried adding -#include c:\orant817\oci\include\oci.h, but this produces the output below, where files included by oci.h can't be found. The oci.h file is at the root of quite a large .h include tree; do I have to specify every .h file in this tree with -#include? My ghc command: ghc -v -Wall -ddump-hi -prof -Lc:\orant817\bin -loci -#include c:\orant817\oci\include\oci.h -fasm -o ociffi --make Main.lhs Output: <snipped> *** CodeOutput: *** C Compiler c:\ghc\ghc-6.2.1\gcc -Bc:\ghc\ghc-6.2.1\gcc-lib/ -x c C:\TEMP\ghc319.hc -o C:\TEMP\ghc319.raw_s -DDONT_WANT_WIN32_DLL_SUPPORT -fno-defer-pop -mno-omit-leaf-frame-pointer -fomit-frame-pointer -fno-builtin -DSTOLEN_X86_REGS=4 -v -S -Wimplicit -O -D__GLASGOW_HASKELL__=602 -DPROFILING -ffloat-store -I . -I c:/ghc/ghc-6.2.1/include -I c:/ghc/ghc-6.2.1/include/mingw Reading specs from c:/ghc/ghc-6.2.1/gcc-lib/specs Configured with: ../gcc/configure --with-gcc --with-gnu-ld --with-gnu-as --host=mingw32 --target=mingw32 --prefix=/mingw --enable-threads --disable-nls --enable-languages=f77,c++,objc,ada --disable-win32-registry --disable-shared Thread model: win32 gcc version 3.2 (mingw special 20020817-1) c:\ghc\ghc-6.2.1\gcc-lib\cc1.exe -lang-c -v -I . -I c:/ghc/ghc-6.2.1/include -I c:/ghc/ghc-6.2.1/include/mingw -iprefix c:\ghc\ghc-6.2.1\../lib/gcc-lib/mingw32/3.2/ -isystem c:/ghc/ghc-6.2.1/gcc-lib/include -D__GNUC__=3 -D__GNUC_MINOR__=2 -D__GNUC_PATCHLEVEL__=0 -D__GXX_ABI_VERSION=102 -D_WIN32 -D__WIN32 -D__WIN32__ -DWIN32 -D__MINGW32__ -D__MSVCRT__ -DWINNT -D_X86_=1 -D_WIN32 -D__WIN32 -D__WIN32__ -D__WIN32__ -D__MINGW32__ -D__MSVCRT__ -D__WINNT__ -D_X86_=1 -D__WIN32 -D__WINNT -Asystem=winnt -D__OPTIMIZE__ -D__STDC_HOSTED__=1 -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i586__ -D__tune_pentium__ -D__stdcall=__attribute__((__stdcall__)) -D__cdecl=__attribute__((__cdecl__)) -D__fastcall=__attribute__((__fastcall__)) -D_stdcall=__attribute__((__stdcall__)) -D_cdecl=__attribute__((__cdecl__)) -D_fastcall=__attribute__((__fastcall__)) -D__declspec(x)=__attribute__((x)) -DDONT_WANT_WIN32_DLL_SUPPORT -DSTOLEN_X86_REGS=4 -D__GLASGOW_HASKELL__=602 -DPROFILING C:\TEMP\ghc319.hc -quiet -dumpbase ghc319.hc -mno-omit-leaf-frame-pointer -O -Wimplicit -version -fno-defer-pop -fomit-frame-pointer -fno-builtin -ffloat-store -o C:\TEMP\ghc319.raw_s GNU CPP version 3.2 (mingw special 20020817-1) (cpplib) (80386, BSD syntax) GNU C version 3.2 (mingw special 20020817-1) (mingw32) compiled by GNU C version 3.2. ignoring nonexistent directory "c:/ghc/lib/gcc-lib/mingw32/3.2/../../../../include" ignoring nonexistent directory "c:/ghc/lib/gcc-lib/mingw32/3.2/include" ignoring nonexistent directory "c:/ghc/lib/gcc-lib/mingw32/3.2/../../../../mingw32/include" ignoring nonexistent directory "/mingw/lib/gcc-lib/mingw32/3.2/../../../../include" ignoring nonexistent directory "/mingw/include" ignoring nonexistent directory "/mingw/lib/gcc-lib/mingw32/3.2/include" ignoring nonexistent directory "/mingw/lib/gcc-lib/mingw32/3.2/../../../../mingw32/include" ignoring nonexistent directory "/usr/local/mingw32/include" #include "..." search starts here: #include <...> search starts here: . c:/ghc/ghc-6.2.1/include c:/ghc/ghc-6.2.1/include/mingw c:/ghc/ghc-6.2.1/gcc-lib/include End of search list. In file included from C:/TEMP/ghc319.hc:5: c:/orant817/oci/include/oci.h:261:23: oratypes.h: No such file or directory c:/orant817/oci/include/oci.h:265:20: ocidfn.h: No such file or directory In file included from C:/TEMP/ghc319.hc:5: c:/orant817/oci/include/oci.h:1419: parse error before "OCILobOffset" c:/orant817/oci/include/oci.h:1419: warning: type defaults to `int' in declaration of `OCILobOffset' c:/orant817/oci/include/oci.h:1419: warning: data definition has no type or storage class c:/orant817/oci/include/oci.h:1429: parse error before "OCILobLength" c:/orant817/oci/include/oci.h:1429: warning: type defaults to `int' in declaration of `OCILobLength' c:/orant817/oci/include/oci.h:1429: warning: data definition has no type or storage class c:/orant817/oci/include/oci.h:1539: parse error before "OCIPicklerTdsElement" c:/orant817/oci/include/oci.h:1539: warning: type defaults to `int' in declaration of `OCIPicklerTdsElement' c:/orant817/oci/include/oci.h:1539: warning: data definition has no type or storage class c:/orant817/oci/include/oci.h:1620: parse error before "OCIWchar" c:/orant817/oci/include/oci.h:1620: warning: type defaults to `int' in declaration of `OCIWchar' c:/orant817/oci/include/oci.h:1620: warning: data definition has no type or storage class c:/orant817/oci/include/oci.h:1648:18: oci1.h: No such file or directory c:/orant817/oci/include/oci.h:1652:17: oro.h: No such file or directory c:/orant817/oci/include/oci.h:1656:17: ori.h: No such file or directory c:/orant817/oci/include/oci.h:1660:17: orl.h: No such file or directory c:/orant817/oci/include/oci.h:1664:17: ort.h: No such file or directory c:/orant817/oci/include/oci.h:1668:21: ociextp.h: No such file or directory c:/orant817/oci/include/oci.h:1672:20: ociapr.h: No such file or directory c:/orant817/oci/include/oci.h:1673:19: ociap.h: No such file or directory c:/orant817/oci/include/oci.h:1680:80: oci8dp.h: No such file or directory c:/orant817/oci/include/oci.h:1684:21: ociextp.h: No such file or directory C:/TEMP/ghc319.hc:6:17: oci.h: No such file or directory C:/TEMP/ghc319.hc: In function `r2Zg_entry': C:/TEMP/ghc319.hc:64: warning: implicit declaration of function `OCIStmtFetch' <snipped> Alistair. ----------------------------------------- ***************************************************************** Confidentiality Note: The information contained in this message, and any attachments, may contain confidential and/or privileged material. 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