SDL_image: Use hidden visibility by default for avif, jxl, and webp builds

From d87f58cefada3d4ea87562cc013578d037bae673 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Sat, 16 Jul 2022 09:43:23 -0700
Subject: [PATCH] Use hidden visibility by default for avif, jxl, and webp
 builds

---
 Xcode/avif/avif.xcodeproj/project.pbxproj | 14 ++++++++++++--
 Xcode/jxl/jxl.xcodeproj/project.pbxproj   |  2 ++
 Xcode/webp/webp.xcodeproj/project.pbxproj |  2 ++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/Xcode/avif/avif.xcodeproj/project.pbxproj b/Xcode/avif/avif.xcodeproj/project.pbxproj
index 954fc173..39292794 100644
--- a/Xcode/avif/avif.xcodeproj/project.pbxproj
+++ b/Xcode/avif/avif.xcodeproj/project.pbxproj
@@ -598,7 +598,12 @@
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
-				GCC_PREPROCESSOR_DEFINITIONS = AVIF_CODEC_DAV1D;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					AVIF_DLL,
+					AVIF_BUILDING_SHARED_LIBS,
+					AVIF_CODEC_DAV1D,
+				);
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
@@ -665,7 +670,12 @@
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
-				GCC_PREPROCESSOR_DEFINITIONS = AVIF_CODEC_DAV1D;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					AVIF_DLL,
+					AVIF_BUILDING_SHARED_LIBS,
+					AVIF_CODEC_DAV1D,
+				);
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
diff --git a/Xcode/jxl/jxl.xcodeproj/project.pbxproj b/Xcode/jxl/jxl.xcodeproj/project.pbxproj
index 6daeb5d3..e75134f4 100644
--- a/Xcode/jxl/jxl.xcodeproj/project.pbxproj
+++ b/Xcode/jxl/jxl.xcodeproj/project.pbxproj
@@ -605,6 +605,7 @@
 					"JPEGXL_PATCH_VERSION=1",
 					JPEGXL_ENABLE_TRANSCODE_JPEG,
 				);
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
@@ -679,6 +680,7 @@
 					"JPEGXL_PATCH_VERSION=1",
 					JPEGXL_ENABLE_TRANSCODE_JPEG,
 				);
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
diff --git a/Xcode/webp/webp.xcodeproj/project.pbxproj b/Xcode/webp/webp.xcodeproj/project.pbxproj
index 49ed6c0e..d9785acc 100644
--- a/Xcode/webp/webp.xcodeproj/project.pbxproj
+++ b/Xcode/webp/webp.xcodeproj/project.pbxproj
@@ -653,6 +653,7 @@
 					"DEBUG=1",
 					"$(inherited)",
 				);
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;
@@ -713,6 +714,7 @@
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_SYMBOLS_PRIVATE_EXTERN = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
 				GCC_WARN_UNDECLARED_SELECTOR = YES;