From b099e5e980339d0ebe9e09f868e13a23b6305762 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=AE=8B=E6=96=87=E6=AD=A6?= <iyzsong@member.fsf.org>
Date: Mon, 7 Aug 2023 22:03:03 +0800
Subject: [PATCH] gnu: exiv2: Get rid of reference to GCC.

This fixes <https://issues.guix.gnu.org/57677>.

* gnu/packages/image.scm (exiv2)[arguments]: Add phase to
remove _GLIBCXX_ASSERTIONS from compiler flags.
---
 gnu/packages/image.scm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gnu/packages/image.scm b/gnu/packages/image.scm
index dadb5f3796..d237bf689c 100644
--- a/gnu/packages/image.scm
+++ b/gnu/packages/image.scm
@@ -1528,6 +1528,12 @@ (define-public exiv2
                                "-DEXIV2_ENABLE_BMFF=ON")
        #:phases
        (modify-phases %standard-phases
+         (add-after 'unpack 'patch-gcc-reference
+           (lambda _
+             ;; _GLIBCXX_ASSERTIONS brings reference to GCC.
+             (substitute* "cmake/compilerFlags.cmake"
+               (("add_compile_options[(]-Wp,-D_GLIBCXX_ASSERTIONS[)]")
+                ""))))
          (add-after 'install 'delete-static-libraries
            (lambda* (#:key outputs #:allow-other-keys)
              (let* ((out (assoc-ref outputs "out"))