[sysprof] build: add -Dlibsysprof option

[Christian Hergert <chergert src gnome org>]

commit 5630e1680fd7094d5801fce3061ec4a04aa6f7ea
Author: Christian Hergert <chergert redhat com>
Date:   Mon Jun 3 12:26:25 2019 -0700

    build: add -Dlibsysprof option
    
    This gets us closer to being able to only build the capture static library

 meson_options.txt             | 3 +++
 src/libsysprof-ui/meson.build | 2 +-
 src/libsysprof/meson.build    | 4 ++++
 src/sysprof/meson.build       | 2 +-
 4 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/meson_options.txt b/meson_options.txt
index fd0c9d1..f30c783 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -3,6 +3,9 @@
 # server scenarios.
 option('enable_gtk', type: 'boolean')
 
+# Disable libsysprof/ui (in situations you only want sysprof-capture)
+option('libsysprof', type: 'boolean')
+
 # Optionally compile sysprofd, which is needed to get elevated privileges.
 # You only really want to ignore this if you are running from a container
 # and are talking to a host daemon. Also, if you're compiling for something
diff --git a/src/libsysprof-ui/meson.build b/src/libsysprof-ui/meson.build
index f25f5f2..fc9c947 100644
--- a/src/libsysprof-ui/meson.build
+++ b/src/libsysprof-ui/meson.build
@@ -1,4 +1,4 @@
-if get_option('enable_gtk')
+if get_option('enable_gtk') and get_option('libsysprof')
 
 libsysprof_ui_public_sources = [
   'sysprof-aid.c',
diff --git a/src/libsysprof/meson.build b/src/libsysprof/meson.build
index 3b9679c..1d89e7d 100644
--- a/src/libsysprof/meson.build
+++ b/src/libsysprof/meson.build
@@ -1,3 +1,5 @@
+if get_option('libsysprof')
+
 libsysprof_c_args = [ '-DSYSPROF_COMPILATION' ]
 
 libsysprof_public_sources = [
@@ -127,3 +129,5 @@ pkgconfig.generate(
 )
 
 install_headers(libsysprof_public_headers, subdir: sysprof_header_subdir)
+
+endif
diff --git a/src/sysprof/meson.build b/src/sysprof/meson.build
index 1595ed4..6a29160 100644
--- a/src/sysprof/meson.build
+++ b/src/sysprof/meson.build
@@ -1,4 +1,4 @@
-if get_option('enable_gtk')
+if get_option('enable_gtk') and get_option('libsysprof')
 
 sysprof_sources = [
   'sysprof.c',