I have a library that compiles fine under linux. But when I try to compile it under mingw on windows 7 I get the following errors.
gcc.exe -c -O2 -I/C/PostgreSQL/9.0/include/server > -I/C/PostgreSQL/9.0/include/server/utils > -I/C/PostgreSQL/9.0/include/server/access > -I/C/PostgreSQL/9.0/include/server/port/win32 -I/C/PostgreSQL/9.0/include > -MMD -MP -MF build/Release/MinGW-Windows/mylib.o.d -o > build/Release/MinGW-Windows/mylib.o mylib.c > The previous command is successful and produces .o files (only some warnings here like: warning: 'pg_finfo_mytype_in' redeclared without dllimport attribute: previous dllimport ignored). The following though gives errors. gcc.exe -shared -o dist/Release/MinGW-Windows/libMyLib.dll > build/Release/MinGW-Windows/mylib.o > Here is the log: build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x128): undefined > reference to `errstart' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x13d): undefined > reference to `_imp__CurrentMemoryContext' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x147): undefined > reference to `MemoryContextAlloc' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x17b): undefined > reference to `timestamp_in' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x180): undefined > reference to `DirectFunctionCall3' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x1be): undefined > reference to `timestamp_in' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x1c3): undefined > reference to `DirectFunctionCall3' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x1f4): undefined > reference to `errmsg' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x202): undefined > reference to `errcode' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x20e): undefined > reference to `errfinish' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x230): undefined > reference to `_imp__CurrentMemoryContext' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x23a): undefined > reference to `MemoryContextAlloc' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x251): undefined > reference to `Int64GetDatum' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x25c): undefined > reference to `timestamp_out' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x261): undefined > reference to `DirectFunctionCall1' > build/Release/MinGW-Windows/mylib.o:mylib.c:(.text+0x284): undefined > reference to `Int64GetDatum' >
