A new packaging guidelines <https://docs.fedoraproject.org/en-US/packaging-guidelines/CMake/> reads:

BuildRequires: cmake
%build
%cmake
%cmake_build

That does not work if "make" package is not installed:

Executing(%build): /bin/sh -e /var/tmp/rpm-tmp.HoJ7oa
+ umask 022
+ cd /home/test/fedora/libwbxml
+ cd libwbxml-libwbxml-0.11.7
+ CFLAGS='-O2 -flto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection'
+ export CFLAGS
+ CXXFLAGS='-O2 -flto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection'
+ export CXXFLAGS
+ FFLAGS='-O2 -flto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -I/usr/lib64/gfortran/modules'
+ export FFLAGS
+ FCFLAGS='-O2 -flto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1  -m64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -I/usr/lib64/gfortran/modules'
+ export FCFLAGS
+ LDFLAGS='-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld'
+ export LDFLAGS
+ LT_SYS_LIBRARY_PATH=/usr/lib64:
+ export LT_SYS_LIBRARY_PATH
+ CC=gcc
+ export CC
+ CXX=g++
+ export CXX
+ /usr/bin/cmake -S . -B x86_64-redhat-linux-gnu -DCMAKE_C_FLAGS_RELEASE:STRING=-DNDEBUG -DCMAKE_CXX_FLAGS_RELEASE:STRING=-DNDEBUG -DCMAKE_Fortran_FLAGS_RELEASE:STRING=-DNDEBUG -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON -DCMAKE_INSTALL_PREFIX:PATH=/usr -DINCLUDE_INSTALL_DIR:PATH=/usr/include -DLIB_INSTALL_DIR:PATH=/usr/lib64 -DSYSCONF_INSTALL_DIR:PATH=/etc -DSHARE_INSTALL_PREFIX:PATH=/usr/share -DLIB_SUFFIX=64 -DBUILD_SHARED_LIBS:BOOL=ON -DBUILD_SHARED_LIBS:BOOL=ON -DBUILD_STATIC_LIBS:BOOL=OFF -DENABLE_INSTALL_DOC:BOOL=OFF -DENABLE_UNIT_TEST:BOOL=ON -DWBXML_ENCODER_USE_STRTBL:BOOL=ON -DWBXML_INSTALL_FULL_HEADERS:BOOL=OFF -DWBXML_LIB_VERBOSE:BOOL=OFF -DWBXML_SUPPORT_AIRSYNC:BOOL=ON -DWBXML_SUPPORT_CO:BOOL=ON -DWBXML_SUPPORT_CONML=ON -DWBXML_SUPPORT_DRMREL:BOOL=ON -DWBXML_SUPPORT_EMN:BOOL=ON -DWBXML_SUPPORT_OTA_SETTINGS:BOOL=ON -DWBXML_SUPPORT_PROV:BOOL=ON -DWBXML_SUPPORT_SI:BOOL=ON -DWBXML_SUPPORT_SL:BOOL=ON -DWBXML_SUPPORT_SYNCML:BOOL=ON -DWBXML_SUPPORT_WML:BOOL=ON -DWBXML_SUPPORT_WTA:BOOL=ON -DWBXML_SUPPORT_WV:BOOL=ON
CMake Error: CMake was unable to find a build program corresponding to "Unix Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!
See also "/home/test/fedora/libwbxml/libwbxml-libwbxml-0.11.7/x86_64-redhat-linux-gnu/CMakeFiles/CMakeOutput.log".

As you can see the %{cmake} macro expands to "/usr/bin/cmake -S . -B x86_64-redhat-linux-gnu ..." and the cmake program checks for a make tool.

This issue is not specific to builing Fedora packages. Following the very first example from <https://cmake.org/cmake/help/latest/guide/tutorial/index.html> results in:

$ cat CMakeLists.txt 
cmake_minimum_required(VERSION 3.10)

# set the project name
project(Tutorial)

# add the executable
add_executable(Tutorial tutorial.cxx)
[test@fedora-33 tmp]$ find x86_64-redhat-linux-gnu/
x86_64-redhat-linux-gnu/
[test@fedora-33 tmp]$ /usr/bin/cmake -S . -B x86_64-redhat-linux-gnu
CMake Error: CMake was unable to find a build program corresponding to "Unix Makefiles".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
-- Configuring incomplete, errors occurred!
See also "/tmp/x86_64-redhat-linux-gnu/CMakeFiles/CMakeOutput.log".

While after installing make, it succeeds:

$ /usr/bin/cmake -S . -B x86_64-redhat-linux-gnu
-- The C compiler identification is GNU 10.2.1
-- The CXX compiler identification is GNU 10.2.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/x86_64-redhat-linux-gnu

I recommend you to add a "Requires: make" dependency to "cmake" RPM package.