From cf8f25b1834dab37e268e68eafe374d6caca6e4b Mon Sep 17 00:00:00 2001
From: Andrea Pappacoda <andrea@pappacoda.it>
Date: Wed, 21 Dec 2022 16:44:08 +0100
Subject: [PATCH] =?UTF-8?q?build(cmake):=20always=20mark=20HAS=5FSTRING=5F?=
 =?UTF-8?q?VIEW=20as=20part=E2=80=A6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

…of the interface

If the library gets compiled with HAS_STRING_VIEW=1, consumers always
need to link to the functions using std::string_view, as they are the
only ones compiled into the shared library.

You can find a longer explanation here:
<https://github.com/HowardHinnant/date/pull/754#issuecomment-1361248007>
---
 CMakeLists.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1a25daa..12f0e46 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,6 +100,8 @@ else()
 endif()
 if ( DISABLE_STRING_VIEW )
   target_compile_definitions( date INTERFACE HAS_STRING_VIEW=0 -DHAS_DEDUCTION_GUIDES=0 )
+else()
+  target_compile_definitions( date INTERFACE HAS_STRING_VIEW=1 )
 endif()
 
 #[===================================================================[