Hi Vania,
find_library(SYSC_LIB systemc PATHS "${SYSTEMC_PATH}"
> PATH_SUFFIXES lib-linux64 lib64-linux lib64-linux64)
>
In this first call, SYSTEMC_PATH is being dereferenced as a CMake
variable. This works because in your invocation of CMake:
cmake -G "Unix Makefiles" -DSYSTEMC_PATH=$HOME/systemc-2.3.1/
>
You define the CMake variable with -D on the command line
However, in your second call
> find_library(SYSC_LIB systemc PATHS ENV SYSTEMC_PATH
> PATH_SUFFIXES lib-linux64 lib64-linux lib64-linux64)
>
the PATHS ENV SYSTEMC_PATH arguments specify that SYSTEMC_PATH be
dereferenced as an environment variable, not a CMake variable. This is
equivalent to PATHS "$ENV{SYSTEMC_PATH}"
--
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