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I get these errors:

gcc: error: ((visibility: No such file or directory

gcc: error: ("default"))): No such file or directory

when compiling bar.c:

#include <mex.h>

void mexFunction( int nlhs, mxArray* plhs[], int nrhs, const mxArray* prhs[] )
{
}

with CMakeLists.txt:

cmake_minimum_required( VERSION 3.12 )

# Project name and version
project( foo )
set( RFC_VERSION_MAJOR "0" )
set( RFC_VERSION_MINOR "2" )

find_package( Matlab QUIET REQUIRED COMPONENTS MX_LIBRARY )

# set up matlab libraries
include_directories( ${Matlab_INCLUDE_DIRS} )

# MEX function (MATLAB)
matlab_add_mex( NAME ${PROJECT_NAME} SRC bar.c OUTPUT_NAME foobar )

This seems to be a problem depending on the used toolchain, since other (older) compilers work.

• System: Red Hat Enterprise Linux Workstation, release 6.10 (Santiago)
• Kernel: Linux 2.6.32-754.9.1.el6.x86_64
• Desktop: GNOME 2.28.2
• Shell: tcsh 6.17.00 (Astron)
• CMake Version 3.13.3
• Compiler: gcc-5.3.0-4
• MATLAB: R2016b

Edit:

Disabling lines 1072ff in FindMatlab.cmake solves the problem in this (my) case:

    set_target_properties(${${prefix}_NAME}
      PROPERTIES
        DEFINE_SYMBOL "DLL_EXPORT_SYM=__attribute__ ((visibility (\"default\")))"
    )