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zikina's Introduction

Zikina (dirty in basque)

crapy example to access (on linux) from C to a Fortran common block in a shared library

Compilation

  • a la mano
gfortran -g -fPIC -o libzut.so -shared zut.f90
gfortran -g -o call_zut call_zut.c -lzut -L.
LD_LIBRARY_PATH="." ./call_zut
  • using cmake
cmake -B build -DCMAKE_BUILD_TYPE=Debug && make -C build && make -C build test

view data from gdb

launch gdb

gdb ./call_zut
(...)
(gdb) b trucmuche_
Breakpoint 1 at 0x1030
(gdb) run
Starting program: (...)/call_zut

Breakpoint 1, trucmuche () at (...)/zut.f90:13
13  subroutine trucmuche()
(gdb) info variables .*csts.*
All variables matching regular expression ".*csts.*":

Non-debugging symbols:
0x0000555555558030  csts
(gdb) x /d &csts
0x555555558030 <csts>:  299792459

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