From b45481a1f2b0066f57020dc4159c646aabeef448 Mon Sep 17 00:00:00 2001
From: Kevin Meagher <11620178+kjmeagher@users.noreply.github.com>
Date: Fri, 1 Nov 2024 15:14:51 -0500
Subject: [PATCH] fix msvc

---
 subprojects/packagefiles/cfitsio/meson.build | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/subprojects/packagefiles/cfitsio/meson.build b/subprojects/packagefiles/cfitsio/meson.build
index 6896db1ca..75718d39f 100644
--- a/subprojects/packagefiles/cfitsio/meson.build
+++ b/subprojects/packagefiles/cfitsio/meson.build
@@ -12,13 +12,19 @@ SOVERSION = 10
 cc = meson.get_compiler('c')
 libm = cc.find_library('m', required: false)
 zlib = dependency('zlib', method: 'pkg-config', required:true, fallback: ['zlib', 'zlib_dep'])
-lib_deps = [libm,zlib]
+lib_deps = [libm, zlib]
 has_fortran = false
 
-if cc.has_header_symbol('unistd.h', 'ftruncate')
-  add_project_arguments('-DHAVE_UNISTD_H', '-DHAVE_FTRUNCATE', language: 'c')
+if cc.has_header('unistd.h')
+  add_project_arguments('-DHAVE_UNISTD_H',language: 'c')
+  # if cc.has_header_symbol('unistd.h', 'ftruncate')
+  #   add_project_arguments('-DHAVE_FTRUNCATE', language: 'c')
+  # endif
+else
+  add_project_arguments('-DYY_NO_UNISTD_H', language: 'c')
 endif
 
+
 # # if cc.get_id() != 'msvc'
 # if host_machine.system() != 'windows'