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Hello! I've faced with strange static linking issue in Cygwin environment. Trivial C program can not be linked against PostgreSQL libpq with the following diagnostics: $ gcc -Wall -I /cygdrive/c/Program\ Files/PostgreSQL/8.2/include/ -L /cygdrive/c/Program\ Files/PostgreSQL/8.2/lib -lpq -o pgtest.exe pgtest.c /cygdrive/c/DOCUME~1/vap/LOCALS~1/Temp/cclXAlCk.o:pgtest.c:(.text+0x33): undefined reference to `_PQconnectdb' /cygdrive/c/DOCUME~1/vap/LOCALS~1/Temp/cclXAlCk.o:pgtest.c:(.text+0x78): undefined reference to `_PQstatus' /cygdrive/c/DOCUME~1/vap/LOCALS~1/Temp/cclXAlCk.o:pgtest.c:(.text+0x8c): undefined reference to `_PQerrorMessage' /cygdrive/c/DOCUME~1/vap/LOCALS~1/Temp/cclXAlCk.o:pgtest.c:(.text+0xc5): undefined reference to `_PQfinish' /cygdrive/c/DOCUME~1/vap/LOCALS~1/Temp/cclXAlCk.o:pgtest.c:(.text+0xd9): undefined reference to `_PQfinish' collect2: ld returned 1 exit status The library is at place and has those symbols defined $ nm /cygdrive/c/Program\ Files/PostgreSQL/8.2/lib/libpq.a | egrep '(_PQconnectdb|_PQstatus|_PQerrorMessage|_PQfinish)' 00000000 T _PQstatus 00000000 I __imp__PQstatus 00000000 T _PQfinish 00000000 I __imp__PQfinish 00000000 T _PQerrorMessage 00000000 I __imp__PQerrorMessage 00000000 T _PQconnectdb 00000000 I __imp__PQconnectdb This libpq.a is from PostgreSQL 8.2.9 distribution for win32. My cygcheck.out is in the attachment. The similar problem is also reproducible at the another PC with different Cygwin installation and with different set of libraries (opengl-1.1.0-10 and freeglut-2.4.0-1) that in this case are part of the Cygwin distribution and were installed via standard Cygwin setup program. For details see attached fly-cubes-cygcheck.out and fly-cubes-link-failure.out. Most strange thing that belongs to this issue is that this sources could be successfully linked with the same package about one month ago, but after some day it became broken without any sight cause because Cygwing installation had never been changed. Does anybody knows why this happens and how to solve this? Any help will be very appreciated. Thank you. --- /vap/
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cygcheck.out
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fly-cubes-cygcheck.out
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fly-cubes-link-failure.out
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