[Meson] Remove ambiguous prefix variable

Instead, always use non-ambiguous `get_option('prefix')`.

Co-authored-by: Wojtek Porczyk <woju@invisiblethingslab.com>
Signed-off-by: Dmitrii Kuvaiskii <dmitrii.kuvaiskii@intel.com>
Signed-off-by: Wojtek Porczyk <woju@invisiblethingslab.com>

libos/test/regression/meson.build

@@ -310,7 +310,7 @@ endforeach
 if get_option('libc') == 'musl'
     meson.add_install_script(
         find_program('install_musl_tests.sh'),
-        prefix / install_dir / 'musl',
+        get_option('prefix') / install_dir / 'musl',
         musl_execs,
     )
 endif

meson.build

@@ -19,7 +19,6 @@ project(
 # we need this subdir() early, because we need scripts defined there for setting up global vars
 subdir('scripts')
 
-prefix = get_option('prefix')
 pkglibdir = get_option('libdir') / meson.project_name()
 pkgdatadir = get_option('datadir') / meson.project_name()
 

tools/meson.build

@@ -1,10 +1,10 @@
 conf = configuration_data()
 conf.set_quoted('IN_GIT', '')
-conf.set_quoted('PREFIX', prefix)
+conf.set_quoted('PREFIX', get_option('prefix'))
 conf.set_quoted('BINDIR', get_option('bindir'))
 
 if direct
-    hostpalpath_direct = prefix / pkglibdir / 'direct'
+    hostpalpath_direct = get_option('prefix') / pkglibdir / 'direct'
     conf_gramine_direct = configuration_data()
     conf_gramine_direct.merge_from(conf)
     conf_gramine_direct.set('SGX', 0)
@@ -24,13 +24,13 @@ endif
 if sgx
     subdir('sgx')
 
-    hostpalpath_linux_sgx = prefix / pkglibdir / 'sgx'
+    hostpalpath_linux_sgx = get_option('prefix') / pkglibdir / 'sgx'
     conf_gramine_sgx = configuration_data()
     conf_gramine_sgx.merge_from(conf)
     conf_gramine_sgx.set('SGX', 1)
     conf_gramine_sgx.set_quoted('HOST_PAL_PATH', hostpalpath_linux_sgx)
     conf_gramine_sgx.set_quoted('LIBPAL_PATH', hostpalpath_linux_sgx / 'libpal.so')
-    conf_gramine_sgx.set_quoted('PAL_CMD', prefix / pkglibdir / 'sgx' / 'loader')
+    conf_gramine_sgx.set_quoted('PAL_CMD', get_option('prefix') / pkglibdir / 'sgx' / 'loader')
     conf_gramine_sgx.set_quoted('CONFIG_SGX_DRIVER', sgx_driver)
 
     configure_file(