For x86-64 builds it is highly recommended to get an up-to-date version of nasm that can understand the latest instruction sets. Building with an older version is usually possible but the library may lack some function versions for the best performance.
The windows dynamic and static libraries can be built with the nmake tool on the windows command line when appropriate paths and tools are setup as follows.
Download and install nasm and add location to path.
set PATH=%PATH%;C:\Program Files\NASM
Install compiler and run environment setup script.
Compilers for windows usually have a batch file to setup environment variables
for the command line called vcvarsall.bat or compilervars.bat or a link to
run these. For Visual Studio this may be as follows for Community edition.
C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat x64
For the Intel compiler the path is typically as follows where yyyy, x, zzz represent the version.
C:\Program Files (x86)\IntelSWTools\system_studio_for_windows_yyyy.x.zzz\compilers_and_libraries_yyyy\bin\compilervars.bat intel64
Run nmake /f Makefile.nmake
This should build isa-l.dll, isa-l.lib and isa-l_static.lib. You may want to
copy the libs to a system directory in the dynamic linking path such as
C:\windows\system32 or to a project directory.
To build a simple program with a static library.
cl /Fe: test.exe test.c isa-l_static.lib