I want to compile apib on my ubuntu 13.04 box but I am having issues with pthread lib. This is the error that I get :

$ colormake -j 5

cd src && make all

make[1]: Entering directory `/home/monkey/bin/apib-1_0/src'

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_cpu.o apib_cpu.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_iothread.o apib_iothread.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_lines.o apib_lines.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_main.o apib_main.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_oauth.o apib_oauth.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_reporting.o apib_reporting.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_priorityq.o apib_priorityq.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_url.o apib_url.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -g -O2 -I. -I/usr/include/apr-1.0 -DHAVE_CONFIG_H -D_GNU_SOURCE   -c -o apib_mon.o apib_mon.c

gcc -std=gnu99 -pedantic -Wall -Wno-deprecated-declarations -o ../apibmon  apib_mon.o apib_lines.o apib_cpu.o -lapr-1

/usr/bin/ld: apib_mon.o: undefined reference to symbol 'pthread_create@@GLIBC_2.2.5'

/usr/bin/ld: note: 'pthread_create@@GLIBC_2.2.5' is defined in DSO /lib/x86_64-linux-gnu/libpthread.so.0 so try adding it to the linker command line

/lib/x86_64-linux-gnu/libpthread.so.0: could not read symbols: Invalid operation

collect2: error: ld returned 1 exit status

make[1]: *** [../apibmon] Error 1

make[1]: *** Waiting for unfinished jobs....

make[1]: Leaving directory `/home/monkey/bin/apib-1_0/src'

make: *** [all] Error 2

Whereas all needed libraries are installed:

$ dpkg -l  | grep apr && dpkg -l | grep libssl

ii  libapr1                                   1.4.6-3ubuntu1                             amd64        Apache Portable Runtime Library

ii  libapr1-dev                               1.4.6-3ubuntu1                             amd64        Apache Portable Runtime Library - Development Headers

ii  libaprutil1                               1.4.1-3                                    amd64        Apache Portable Runtime Utility Library

ii  libaprutil1-dbd-sqlite3                   1.4.1-3                                    amd64        Apache Portable Runtime Utility Library - SQLite3 Driver

ii  libaprutil1-dev                           1.4.1-3                                    amd64        Apache Portable Runtime Utility Library - Development Headers

ii  libaprutil1-ldap                          1.4.1-3                                    amd64        Apache Portable Runtime Utility Library - LDAP Driver

ii  libssl-dev                                1.0.1c-4ubuntu8.1                          amd64        SSL development libraries, header files and documentation

ii  libssl-doc                                1.0.1c-4ubuntu8.1                          all          SSL development documentation documentation

ii  libssl1.0.0:amd64                         1.0.1c-4ubuntu8.1                          amd64        SSL shared libraries

ii  libssl1.0.0:i386                          1.0.1c-4ubuntu8.1                          i386         SSL shared libraries

In Makefile :

APR_LIBS = -L/lib/x86_64-linux-gnu/ -lm -lcrypto -lpthread -lssl -lapr-1 -laprutil-1