From 483dc15fe61a015904122a4f2e17873bcc1c48ad Mon Sep 17 00:00:00 2001
From: Matt Murphy <111342020+thesmurph@users.noreply.github.com>
Date: Tue, 15 Nov 2022 05:52:13 +0000
Subject: [PATCH] This skips the scan-test if strptime isn't defined. Newlib is
 used in cygwin and embedded systems. By default newlib doesn't provide
 strptime in time.h because it was added in a later X/Open versions. Issue:
 #3178

---
 test/CMakeLists.txt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index a198b513..ce2b77d3 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,5 +1,7 @@
 add_subdirectory(gtest)
 
+include(CheckSymbolExists)
+
 set(TEST_MAIN_SRC test-main.cc gtest-extra.cc gtest-extra.h util.cc)
 add_library(test-main STATIC ${TEST_MAIN_SRC})
 target_include_directories(test-main PUBLIC
@@ -75,7 +77,14 @@ if (MSVC)
 endif()
 add_fmt_test(printf-test)
 add_fmt_test(ranges-test ranges-odr-test.cc)
-add_fmt_test(scan-test)
+
+check_symbol_exists(strptime "time.h" HAVE_STRPTIME)
+if (HAVE_STRPTIME)
+  add_fmt_test(scan-test)
+else()
+  message(WARNING "Skipping scan-test due to missing strptime dependency.")
+endif ()
+
 add_fmt_test(std-test)
 try_compile(compile_result_unused
             ${CMAKE_CURRENT_BINARY_DIR}