buildroot/package/tesseract-ocr/0001-Check-if-platform-supports-feenableexcept.patch

From 52484af83a58664c3cc91b8af07aeeea271f67ef Mon Sep 17 00:00:00 2001
From: Gilles Talis <gilles.talis@gmail.com>
Date: Sun, 9 Jan 2022 10:58:36 +0100
Subject: [PATCH] Check if platform supports feenableexcept

Signed-off-by: Gilles Talis <gilles.talis@gmail.com>
---
 configure.ac      | 4 ++++
 src/tesseract.cpp | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 9177d64..80cd735 100644
--- a/configure.ac
+++ b/configure.ac
@@ -188,6 +188,10 @@ case "${host_cpu}" in
 
 esac

+# check whether feenableexcept is supported. some C libraries (e.g. uclibc) don't.
+AC_CHECK_FUNC(feenableexcept, [feenableexcept=true], [feenableexcept=false])
+AM_CONDITIONAL([HAVE_FEENABLEEXCEPT], $feenableexcept)
+
 AX_CHECK_COMPILE_FLAG([-fopenmp-simd], [openmp_simd=true], [openmp_simd=false], [$WERROR])
 AM_CONDITIONAL([OPENMP_SIMD], $openmp_simd)
 
diff --git a/src/tesseract.cpp b/src/tesseract.cpp
index 933116e..9154db8 100644
--- a/src/tesseract.cpp
+++ b/src/tesseract.cpp
@@ -629,7 +629,7 @@ static void PreloadRenderers(tesseract::TessBaseAPI &api,
  **********************************************************************/
 
 int main(int argc, char **argv) {
-#if defined(__USE_GNU)
+#if defined(__USE_GNU) && defined(HAVE_FEENABLEEXCEPT)
   // Raise SIGFPE.
 #  if defined(__clang__)
   // clang creates code which causes some FP exceptions, so don't enable those.
-- 
2.32.0