meson: Only build blkzone and blkpr if the required linux header exists

Checks for the required headers for blkzone and blkptr are done for
 Autotools.
This logic wasn't carried over to Meson.
This PR just adds the same checks.

Fixes #2850.

Signed-off-by: Jordan Williams <jordan@jwillikers.com>

diff --git a/meson.build b/meson.build
index f7baab7a22640c4a7cdef694e20e54040e07409f..9600ce49f73d69045a9ddc304bb3570aec72a85e 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -1561,26 +1561,30 @@ exes += exe
 manadocs += ['sys-utils/blkdiscard.8.adoc']
 bashcompletions += ['blkdiscard']
 
-exe = executable(
-  'blkzone',
-  blkzone_sources,
-  include_directories : includes,
-  link_with : [lib_common],
-  install_dir : sbindir,
-  install : true)
-exes += exe
-manadocs += ['sys-utils/blkzone.8.adoc']
-bashcompletions += ['blkzone']
+if cc.has_header('linux/blkzoned.h')
+  exe = executable(
+    'blkzone',
+    blkzone_sources,
+    include_directories : includes,
+    link_with : [lib_common],
+    install_dir : sbindir,
+    install : true)
+  exes += exe
+  manadocs += ['sys-utils/blkzone.8.adoc']
+  bashcompletions += ['blkzone']
+endif
 
-exe = executable(
-  'blkpr',
-  blkpr_sources,
-  include_directories : includes,
-  link_with : [lib_common],
-  install_dir : sbindir,
-  install : true)
-exes += exe
-manadocs += ['sys-utils/blkpr.8.adoc']
+if cc.has_header('linux/pr.h')
+  exe = executable(
+    'blkpr',
+    blkpr_sources,
+    include_directories : includes,
+    link_with : [lib_common],
+    install_dir : sbindir,
+    install : true)
+  exes += exe
+  manadocs += ['sys-utils/blkpr.8.adoc']
+endif
 
 exe = executable(
   'ldattach',