BUILD: Simplify build-linux.sh a bit.

As the build is likely a fire-and-forget there's no
need to produce a Multi-Config build using a preset,
especially not as most presets default to Ninja as
generator. Instead configure a plain build, and if
ninja is detected, enable it.

build-linux.sh

@@ -9,10 +9,10 @@ NC='\e[0m'
 
 BUILD_LOG=/tmp/ezquake-build.log
 
-PKGS_DEB="git cmake ninja-build build-essential libsdl2-2.0-0 libsdl2-dev libjansson-dev libexpat1-dev libcurl4-openssl-dev libpng-dev libjpeg-dev libspeex-dev libspeexdsp-dev libfreetype-dev libsndfile1-dev libpcre2-dev libminizip-dev"
-PKGS_RPM="pcre2-devel cmake ninja-build mesa-libGL-devel SDL2-devel make gcc jansson-devel expat-devel libcurl-devel libpng-devel libjpeg-turbo-devel speex-devel speexdsp-devel freetype-devel libsndfile-devel libXxf86vm-devel minizip-devel"
-PKGS_ARCH="base-devel cmake ninja libpng libjpeg-turbo sdl2 expat libcurl-compat freetype2 speex speexdsp jansson libsndfile minizip"
-PKGS_VOID="base-devel cmake ninja SDL2-devel pcre2-devel jansson-devel expat-devel libcurl-devel libpng-devel libjpeg-turbo-devel speex-devel speexdsp-devel freetype-devel libsndfile-devel libXxf86vm-devel minizip"
+PKGS_DEB="git cmake build-essential libsdl2-2.0-0 libsdl2-dev libjansson-dev libexpat1-dev libcurl4-openssl-dev libpng-dev libjpeg-dev libspeex-dev libspeexdsp-dev libfreetype-dev libsndfile1-dev libpcre2-dev libminizip-dev"
+PKGS_RPM="pcre2-devel cmake mesa-libGL-devel SDL2-devel make gcc jansson-devel expat-devel libcurl-devel libpng-devel libjpeg-turbo-devel speex-devel speexdsp-devel freetype-devel libsndfile-devel libXxf86vm-devel minizip-devel"
+PKGS_ARCH="base-devel cmake libpng libjpeg-turbo sdl2 expat libcurl-compat freetype2 speex speexdsp jansson libsndfile minizip"
+PKGS_VOID="base-devel cmake SDL2-devel pcre2-devel jansson-devel expat-devel libcurl-devel libpng-devel libjpeg-turbo-devel speex-devel speexdsp-devel freetype-devel libsndfile-devel libXxf86vm-devel minizip"
 
 CPU=$(uname -m | sed -e s/i.86/i386/ -e s/amd64/x86_64/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/ -e s/alpha/axp/)
 
@@ -139,10 +139,13 @@ if [ -d ".git" ]; then
 fi
 
 step "Configure build..."
-cmake --preset dynamic
+if command -v ninja >/dev/null 2>&1; then
+  GENERATOR="-G Ninja"
+fi
+cmake -B build "${GENERATOR}" -DCMAKE_BUILD_TYPE=Release
 
 step "Compiling sources (this might take a while, please wait)..."
-cmake --build build-dynamic --config Release
+cmake --build build --parallel
 
 printf "\n${GREEN}Build completed successfully.${NC}\n"
-printf "Copy ${YELLOW}ezquake-${CPU}${NC} into your quake directory.\n\n"
+printf "Copy ${YELLOW}build/ezquake-${CPU}${NC} into your quake directory.\n\n"