Hi,
I'm trying to build PTLib 2.10.1 in Ubuntu 11, and I have a problem with pthreads. When I run ./configure, I get the following output:
checking for pkg-config... /usr/bin/pkg-config checking pkg-config is at least version 0.9.0... yes checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes .10figure: PTLib version is 2 checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking target system type... i686-pc-linux-gnu checking for swab... no configure: OSTYPE set to linux configure: OSRELEASE set to "2.6.38-8-generic" configure: MACHTYPE set to x86 configure: gcc version is 4.5.2 checking checking if pragma implementation should be used... no checking checking if precompiled headers available... no checking how to run the C++ preprocessor... g++ -E checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for ANSI C header files... no checking for sys/types.h... no checking for sys/stat.h... no checking for stdlib.h... no checking for string.h... no checking for memory.h... no checking for strings.h... no checking for inttypes.h... no checking for stdint.h... no checking for unistd.h... no checking whether byte ordering is bigendian... yes configure: Default extension for C++ files is cpp checking if compiler accepts -felide-constructors... no checking if linker accepts -Wreorder... no checking if debug build accepts -g3 -ggdb -O0... no checking if compiler uses RTTI by default... no checking size of int... 0 checking for long double with more range or precision than double... no checking for flex... /usr/bin/flex checking for ar... ar checking for bison... /usr/bin/bison checking if readdir_r has 2 parms... no checking if readdir_r has 3 parms... no configure: PTRACE and all trace logging included configure: Using ANSI C++ bool for PBoolean: (PFalse=false PTrue=true) checking for recvmsg... no checking for IPV6_ADD_MEMBERSHIP... no checking for NetLink support... no checking if using STL streams... no checking if atomic integer available... no checking if Unix semaphores are available... no checking if named semaphores are available... no configure: WARNING: This host does not support semaphores which are essential configure: WARNING: to implement 'critical sections'. This feature was added configure: WARNING: in PWLib 1.7.0 and improves the stability of multithreaded configure: WARNING: programs. This feature has been disabled for this host checking for pthread_create in -lpthread... no configure: error: must have pthreads!
But if I do: whereis pthread.h I get: /usr/include/pthread.h
So it seems that pthreads is installed. What am I doing wrong?
Regards, and thank you in advance for your help.