I have updated Cygwin_x86 and Cygwin_x86-64 today. In building the gnuplot I have met the error of "multiple definition of `atan2l'". /usr/lib/gcc/x86_64-pc-cygwin/5.3.0/libstdc++.dll.a(d005836.o):(.text+0x0): multiple definition of `atan2l' /usr/lib/../lib/libm.a(t-d000195.o):fake:(.text+0x0): first defined here collect2: error: ld returned 1 exit status Makefile:777: recipe for target 'gnuplot.exe' failed This did not occur yesterday. Perhaps the latest change gcc-5.3.0 give this results. At the moment a workaroud is : LDFLAGS='-Wl,--allow-multiple-definition' \ at configure. Tatsuro
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