Intallation fails on Ubuntu about open-cobol-esql HOT 3 OPEN

I removed the description of LD_PRELOAD in README and created a new wiki page for Ubuntu users.
I will fix this issue in the future.

from open-cobol-esql.

It seems difficult to solve this issue.
I added note to README.

from open-cobol-esql.

LD_PRELOAD is a quite bad hack, with that README note people will likely export it which commonly breaks something and tells the dynamic link loader to do this for every executable. The issue is that libcob does not find the module, very likely because the actual CALL is a dynamic one and/or the dynamic linker removed the "unused" library.

To work around this each of the following solutions should work;

• let ocesql generate the CALLs as CALL STATIC 'OCESQLConnect' ... (cobc will directly insert the library call, the dynamic linker will resolve that from libocesql
• let cobc generate all calls to literals as static itself - same effect cobc -static -m ...
• tell the linker to not drop the "unused" library, by passing -Wl,--no-as-needed (depending on the cobc used that can be passed via -Q or by overriding cobc's linker call via environment variables)

... or: use COB_PRE_LOAD to load the library, or relink libcob/cobcrun to have the library linked with the -Wl,--no-as-needed option.

from open-cobol-esql.