From bf583cd5fdb7fecef8055dfa31ef2334cdd66fa6 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter@eisentraut.org>
Date: Wed, 11 May 2022 09:06:39 +0200
Subject: [PATCH 4/9] meson: Add dtrace option

This currently only works on macOS.  The dtrace -G calls needed on
other platforms are not implemented yet.  Therefore, the option is not
auto by default.
---
 meson.build                   |  1 +
 meson_options.txt             |  6 ++++++
 src/include/utils/meson.build | 34 ++++++++++++++++++++++++++--------
 3 files changed, 33 insertions(+), 8 deletions(-)

diff --git a/meson.build b/meson.build
index a07e25c732..7cb2083936 100644
--- a/meson.build
+++ b/meson.build
@@ -162,6 +162,7 @@ program_lz4 = find_program(get_option('LZ4'), native: true, required: false)
 touch = find_program('touch', native: true)
 sh = find_program('sh', native: true) # FIXME, should get rid of this
 program_zstd = find_program(get_option('ZSTD'), native: true, required: false)
+dtrace = find_program(get_option('DTRACE'), required: get_option('dtrace'))
 
 # Internal programs
 testwrap = find_program('src/tools/testwrap', native: true)
diff --git a/meson_options.txt b/meson_options.txt
index f57410fa50..56440f81d0 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -50,6 +50,9 @@ option('extra_lib_dirs', type : 'array', value: [],
 
 # External dependencies
 
+option('dtrace', type : 'feature', value: 'disabled',
+  description: 'DTrace support')
+
 option('gssapi', type : 'feature', value: 'auto',
   description: 'GSSAPI support')
 
@@ -116,6 +119,9 @@ option('zstd', type : 'feature', value: 'auto',
 option('BISON', type : 'string', value: 'bison',
   description: 'path to bison binary')
 
+option('DTRACE', type : 'string', value: 'dtrace',
+  description: 'path to dtrace binary')
+
 option('FLEX', type : 'string', value: 'flex',
   description: 'path to flex binary')
 
diff --git a/src/include/utils/meson.build b/src/include/utils/meson.build
index 6e1437f300..152a235b5c 100644
--- a/src/include/utils/meson.build
+++ b/src/include/utils/meson.build
@@ -7,14 +7,32 @@ errcodes = custom_target('errcodes',
 )
 generated_headers += errcodes
 
-generated_backend_headers += custom_target('probes.d',
-  input: files('../../backend/utils/probes.d'),
-  output : 'probes.h',
-  capture: true,
-  command : [sed, '-f', files('../../backend/utils/Gen_dummy_probes.sed'), '@INPUT@'],
-  install: true,
-  install_dir: dir_include_server/'utils',
-)
+if dtrace.found()
+  probes_tmp = custom_target('probes.h.tmp',
+    input: files('../../backend/utils/probes.d'),
+    output : 'probes.h.tmp',
+    command : [dtrace, '-C', '-h', '-s', '@INPUT@', '-o', '@OUTPUT@'],
+  )
+  probes = custom_target('probes.h',
+    input: probes_tmp[0],
+    output : 'probes.h',
+    capture: true,
+    command : [sed, '-f', files('../../backend/utils/postprocess_dtrace.sed'), '@INPUT@'],
+    install: true,
+    install_dir: dir_include_server/'utils',
+  )
+else
+  probes = custom_target('probes.h',
+    input: files('../../backend/utils/probes.d'),
+    output : 'probes.h',
+    capture: true,
+    command : [sed, '-f', files('../../backend/utils/Gen_dummy_probes.sed'), '@INPUT@'],
+    install: true,
+    install_dir: dir_include_server/'utils',
+  )
+endif
+
+generated_backend_headers += probes
 
 fmgrtab_target = custom_target('fmgrtab',
   input: '../catalog/pg_proc.dat',
-- 
2.35.1