CODEWITHSUNDEEP
c++linuxstatic-librarieslibtool
Maneesh Singh
Maneesh Singh

Reputation: 21

linking static libraries with libtool

How to link a static library (.a) with libtool?

I am creating a apache module (mod_shib_22.so) which is using three RSA library libcertc.a , libcertcsp.a and libbsafe.a I am linking these libraries with -lcertc -lcertcsp -lbafe but while loading the module I am getting "symbol undefined" errors:

./apachectl -k stop httpd: Syntax error on line 426 of /usr/local/apache2/conf/httpd.conf:
Cannot load /usr/local/lib64/shibboleth/mod_shib_22.so into server:  /usr/local/lib64/shibboleth/mod_shib_22.so: undefined symbol: T_GetDynamicList

I am using these lines in Makefile:

LDFLAGS = -L../../libraries/Crypto-C-6.4.0.3/lib/linux_lsb30_x86_64 -L../../libraries/Cert-C-2.9.0.0/lib/LinuxLSB30_x86_64/release_mt
LIBOBJS = 
LIBS = -lxerces-c -L/usr/local/lib64 -llog4shib -lnsl -lcertc -lcertcsp -lbsafe -ldl

Upvotes: 1

Views: 945

Answers (1)

ldav1s
ldav1s

Reputation: 16305

Linking a DSO (an Apache module in this case) with a static library isn't guaranteed to work, and probably won't work depending on how the objects in the static library are built. Usually objects in static libraries are not built with position independent code enabled, but DSOs require position independent code.

Upvotes: 1

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