clang 11 generates many multiple definitions when linking mmg

Question

clang 11 generates many multiple definitions when linking mmg

prudhomm opened this issue 4 years ago · comments

Christophe Prud'homme commented 4 years ago

in clang11 the option -fno-common has been enabled as the default for all targets. Therefore, C code that uses tentative definitions as definitions of a variable in multiple translation units will trigger multiple-definition linker errors.
Generally, this occurs when the use of the extern keyword is neglected in the declaration of a variable in a header file.
In some cases, no specific translation unit provides a definition of the variable.
The previous behavior can be restored by specifying -fcommon.

I will set -fcommon but it might be good to consider these errors ?

here are the multiple definitions:

build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x10): multiple definition of `MMG5_bezierCP'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x8): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x8): multiple definition of `MMG5_chkmsh'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x0): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x40): multiple definition of `MMG5_compute_meanMetricAtMarkedPoints'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x38): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x30): multiple definition of `MMG5_grad2met_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x28): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x38): multiple definition of `MMG5_grad2metreq_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x30): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x20): multiple definition of `MMG5_indElt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x18): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x28): multiple definition of `MMG5_indPt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x20): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x18): multiple definition of `MMG5_lenSurfEdg'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x10): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x48): multiple definition of `MMG5_renumbering'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x40): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x68): multiple definition of `MMG2D_caltri'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x70): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x48): multiple definition of `MMG2D_defsiz'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x50): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x70): multiple definition of `MMG2D_gradsiz'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x78): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x60): multiple definition of `MMG2D_gradsizreq'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x68): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x50): multiple definition of `MMG2D_intmet'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x58): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x58): multiple definition of `MMG2D_lencurv'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x60): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x10): multiple definition of `MMG5_bezierCP'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x8): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x8): multiple definition of `MMG5_chkmsh'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x0): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x0): multiple definition of `MMG5_compute_meanMetricAtMarkedPoints'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x38): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x30): multiple definition of `MMG5_grad2met_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x28): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x38): multiple definition of `MMG5_grad2metreq_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x30): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x20): multiple definition of `MMG5_indElt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x18): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x28): multiple definition of `MMG5_indPt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x20): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x18): multiple definition of `MMG5_lenSurfEdg'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x10): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/isosiz_2d.c.o:(.bss+0x40): multiple definition of `MMG5_renumbering'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x40): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x68): multiple definition of `MMG2D_caltri'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x70): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x48): multiple definition of `MMG2D_defsiz'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x50): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x70): multiple definition of `MMG2D_gradsiz'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x78): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x60): multiple definition of `MMG2D_gradsizreq'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x68): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x50): multiple definition of `MMG2D_intmet'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x58): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x58): multiple definition of `MMG2D_lencurv'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x60): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x8): multiple definition of `MMG5_bezierCP'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x8): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x0): multiple definition of `MMG5_chkmsh'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x0): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x38): multiple definition of `MMG5_compute_meanMetricAtMarkedPoints'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x38): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x28): multiple definition of `MMG5_grad2met_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x28): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x30): multiple definition of `MMG5_grad2metreq_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x30): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x18): multiple definition of `MMG5_indElt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x18): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x20): multiple definition of `MMG5_indPt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x20): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x10): multiple definition of `MMG5_lenSurfEdg'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x10): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/libmmg2d.c.o:(.bss+0x40): multiple definition of `MMG5_renumbering'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x40): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x68): multiple definition of `MMG2D_caltri'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x70): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x48): multiple definition of `MMG2D_defsiz'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x50): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x70): multiple definition of `MMG2D_gradsiz'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x78): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x60): multiple definition of `MMG2D_gradsizreq'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x68): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x50): multiple definition of `MMG2D_intmet'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x58): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x58): multiple definition of `MMG2D_lencurv'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x60): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x8): multiple definition of `MMG5_bezierCP'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x8): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x0): multiple definition of `MMG5_chkmsh'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x0): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x38): multiple definition of `MMG5_compute_meanMetricAtMarkedPoints'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x38): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x28): multiple definition of `MMG5_grad2met_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x28): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x30): multiple definition of `MMG5_grad2metreq_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x30): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x18): multiple definition of `MMG5_indElt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x18): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x20): multiple definition of `MMG5_indPt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x20): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x10): multiple definition of `MMG5_lenSurfEdg'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x10): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/mmg2dexterns.c.o:(.bss+0x40): multiple definition of `MMG5_renumbering'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x40): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x68): multiple definition of `MMG2D_caltri'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x70): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x48): multiple definition of `MMG2D_defsiz'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x50): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x70): multiple definition of `MMG2D_gradsiz'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x78): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x60): multiple definition of `MMG2D_gradsizreq'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x68): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x50): multiple definition of `MMG2D_intmet'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x58): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x58): multiple definition of `MMG2D_lencurv'; CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/anisosiz_2d.c.o:(.bss+0x60): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x8): multiple definition of `MMG5_bezierCP'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x8): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x0): multiple definition of `MMG5_chkmsh'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x0): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x38): multiple definition of `MMG5_compute_meanMetricAtMarkedPoints'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x38): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x28): multiple definition of `MMG5_grad2met_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x28): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x30): multiple definition of `MMG5_grad2metreq_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x30): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x18): multiple definition of `MMG5_indElt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x18): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x20): multiple definition of `MMG5_indPt'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x20): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x10): multiple definition of `MMG5_lenSurfEdg'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x10): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg2d/variadic_2d.c.o:(.bss+0x40): multiple definition of `MMG5_renumbering'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x40): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg3d/anisosiz_3d.c.o:(.bss+0x38): multiple definition of `MMG5_bezierCP'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x8): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg3d/anisosiz_3d.c.o:(.bss+0x30): multiple definition of `MMG5_chkmsh'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x0): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg3d/anisosiz_3d.c.o:(.bss+0x60): multiple definition of `MMG5_compute_meanMetricAtMarkedPoints'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x38): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg3d/anisosiz_3d.c.o:(.bss+0x50): multiple definition of `MMG5_grad2met_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x28): first defined here
[build] /usr/bin/ld: CMakeFiles/libfeelpp_mmg_so.dir/src/mmg3d/anisosiz_3d.c.o:(.bss+0x58): multiple definition of `MMG5_grad2metreq_ani'; CMakeFiles/libfeelpp_mmg_so.dir/src/common/mmgexterns.c.o:(.bss+0x30): first defined here
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Algiane Froehly · Answer 1 · Tue Oct 20 2020 00:57:13 GMT+0800 (China Standard Time)

Hello Christophe,

Thanks for this feedback.

I am trying to reproduce the compiler error by building a very simple c++ program that links Mmg but for now I can't reproduce the bug (even if I enforce the -fno-common flag):

are you using clang on a linux distribution or on osx?
if on osx, does it occurs with the XCode's clang or with another version of clang?

thank you by advance,
Regards,

Algiane

Christophe Prud'homme · Answer 2 · Thu Oct 22 2020 02:58:55 GMT+0800 (China Standard Time)

@Algiane I am using it on linux ubuntu 20.04, I installed the 20.04 ubuntu packages

be careful that on osx the clang version shipped by apple does not correspond to the clang version shipped by llvm.

Algiane Froehly · Answer 3 · Fri Oct 23 2020 19:31:40 GMT+0800 (China Standard Time)

Hello Christophe,

Thank you for the precisions.

Running on ubuntu 20.04 with clang++-11 I was able to reproduce your compiler errors (by compiling the remesh branch of the feelpp repository).

For me the errors are linked to the 5.4.3 version of Mmg but have been removed in the 5.5.1 release (I have just replaced the feelpp/feelpp/contrib/mmg directory by the new version).

Just note that with a version of CMake >= 3.13, I had to add few lines in contrib/CMakeLists.txt to avoid the download of the Mmg tests. I attach the patch in case you find it usefull.

cmake_policy_cmp0077.txt

Please, let me know if the release 5.5.1 of Mmg solves your compilation issue.

Regards,
Algiane

Algiane Froehly · Answer 4 · Mon May 10 2021 21:31:29 GMT+0800 (China Standard Time)

Hello @prudhomm,

Can I close this thread or is it still something to fix?

Thank you by advance,
Algiane

Christophe Prud'homme · Answer 5 · Tue May 11 2021 02:31:36 GMT+0800 (China Standard Time)

@Algiane the problem is still there.currently it can be pushed under the rug with an option.
It would be best at some point to fix the code and be compliant.

Algiane Froehly · Answer 6 · Tue May 11 2021 16:25:20 GMT+0800 (China Standard Time)

Thanks for the feedback: it happens with both versions of Mmg (5.4.3 and 5.5.1) or only with the 5.4 one (I still fail to reproduce the error with the 5.5.1 release)?

Algiane Froehly · Answer 7 · Sat May 14 2022 01:57:05 GMT+0800 (China Standard Time)

Hi @prudhomm ,

This issue should be fixed in the 5.6.0 release.
Please, let me know if it works for you too.

Best Regards,
Algiane

Christophe Prud'homme · Answer 8 · Sat May 14 2022 02:32:46 GMT+0800 (China Standard Time)

I believe this is fixed 👍
Now mmg and parmmg compile nicely

Algiane Froehly · Answer 9 · Sat May 14 2022 03:08:15 GMT+0800 (China Standard Time)

Thanks for taking the time to give me this feedback!