meson: Rename the configuration options

The `enable-` prefix is an Autotool-ism; idiomatic naming for Meson
projects should just use the name of the option, and rely on the type
to convey meaning, especially because Meson does not have `disable`
aliases that avoid the explicit `enable-foo=no` cases.

.travis.yml

@@ -28,5 +28,6 @@ before_script:
 
 script:
   - docker run withgit /bin/sh -c "CC=$CC ./epoxy-run-tests.sh"
-  - docker run withgit /bin/sh -c "CC=$CC ./epoxy-run-tests.sh -Denable-glx=no"
+  - docker run withgit /bin/sh -c "CC=$CC ./epoxy-run-tests.sh -Dglx=no"
-  - docker run withgit /bin/sh -c "CC=$CC ./epoxy-run-tests.sh -Denable-egl=no"
+  - docker run withgit /bin/sh -c "CC=$CC ./epoxy-run-tests.sh -Degl=no"
+  - docker run withgit /bin/sh -c "CC=$CC ./epoxy-run-tests.sh -Dx11=false"

meson.build

@@ -34,7 +34,7 @@ conf.set('HAVE_KHRPLATFORM_H', cc.has_header('KHR/khrplatform.h', required: fals
 # configure time switch to enable or disable it; in case
 # the "auto" default value is set, we only enable GLX
 # support on Linux and Unix
-enable_glx = get_option('enable-glx')
+enable_glx = get_option('glx')
 if enable_glx == 'auto'
   if host_system == 'windows'
     build_glx = false
@@ -53,7 +53,7 @@ elif enable_glx == 'no'
   build_glx = false
 endif
 
-enable_egl = get_option('enable-egl')
+enable_egl = get_option('egl')
 if enable_egl == 'auto'
   if host_system == 'windows'
     build_egl = false
@@ -249,7 +249,7 @@ subdir('include/epoxy')
 subdir('src')
 subdir('test')
 
-if get_option('enable-docs')
+if get_option('docs')
   doxygen = find_program('doxygen', required: false)
   if doxygen.found()
     subdir('doc')

meson_options.txt

@@ -1,12 +1,12 @@
-option('enable-docs',
+option('docs',
        type: 'boolean', value: false,
        description: 'Enable generating the Epoxy API reference (depends on Doxygen)')
-option('enable-glx',
+option('glx',
        type: 'combo',
        choices: [ 'auto', 'yes', 'no' ],
        value: 'auto',
        description: 'Enable GLX support')
-option('enable-egl',
+option('egl',
        type: 'combo',
        choices: [ 'auto', 'yes', 'no' ],
        value: 'auto',