Build the vdso with a custom target

This allows compiling the project but not the vdso with things like asan or afl.
Sekedo664 · Oct 13, 2017 · a80c109 · a80c109
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commit a80c109
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Showing 2 changed files with 10 additions and 3 deletions.
diff --git a/meson_options.txt b/meson_options.txt
@@ -1,2 +1,5 @@
 option('log', type: 'string', value: '')
 option('nolog', type: 'string', value: '')
+
+option('vdso_cc', type: 'string', value: 'cc')
+option('vdso_c_args', type: 'string', value: '')
diff --git a/vdso/meson.build b/vdso/meson.build
@@ -1,4 +1,8 @@
 # the vdso
-vdso = shared_library('vdso', ['vdso.S', 'vdso.c', 'note.S'], c_args: ['-m32'],
-    link_args: ['-m32', '-nostdlib', '-Wl,-T,../vdso/vdso.lds'],
-    link_depends: ['vdso.lds'])
+# I can't use shared_library for this because then I have to use the same
+# compiler and options as the rest of the project which prevents me from using
+# sanitizers and afl
+vdso = custom_target('vdso', input: ['vdso.S', 'vdso.c'], output: 'libvdso.so',
+    command: [get_option('vdso_cc'), '-o', '@OUTPUT@', '@INPUT@',
+        '-m32', '-nostdlib', '-Wl,-T,../vdso/vdso.lds', '-shared', '-fPIC']
+        + get_option('vdso_c_args').split())