[gdk-pixbuf/otte/jpeg-fallback] build: Add a libjpeg fallback wrap

[Benjamin Otte <otte src gnome org>]

commit 4f6254460d50f5c790b4e9d1b4e507bf20455444
Author: Benjamin Otte <otte redhat com>
Date:   Wed Mar 31 19:50:18 2021 +0200

    build: Add a libjpeg fallback wrap

 meson.build              |  5 +++++
 subprojects/libjpeg.wrap | 12 ++++++++++++
 2 files changed, 17 insertions(+)
---
diff --git a/meson.build b/meson.build
index 7880577dc..27b2ea84e 100644
--- a/meson.build
+++ b/meson.build
@@ -315,6 +315,11 @@ if get_option('jpeg') and not native_windows_loaders
       # so look for it as well when jpeg.lib cannot be found
       jpeg_dep = cc.find_library('libjpeg', required: false)
     endif
+
+    if not jpeg_dep.found()
+      jpeg_dep = dependency('libjpeg', required: false, fallback: 'libjpeg')
+    endif
+
     if jpeg_dep.found() and cc.has_function('jpeg_destroy_decompress', dependencies: jpeg_dep)
       enabled_loaders += 'jpeg'
       loaders_deps += jpeg_dep
diff --git a/subprojects/libjpeg.wrap b/subprojects/libjpeg.wrap
new file mode 100644
index 000000000..1433fce3a
--- /dev/null
+++ b/subprojects/libjpeg.wrap
@@ -0,0 +1,12 @@
+[wrap-file]
+directory = jpeg-9c
+source_url = http://ijg.org/files/jpegsrc.v9c.tar.gz
+source_filename = jpegsrc.v9c.tar.gz
+source_hash = 650250979303a649e21f87b5ccd02672af1ea6954b911342ea491f351ceb7122
+patch_url = https://wrapdb.mesonbuild.com/v1/projects/libjpeg/9c/3/get_zip
+patch_filename = libjpeg-9c-3-wrap.zip
+patch_hash = 2d66676d254be9198d8b6b62a798d6858c7f7cea9ed0e93809d6c035351a9bba
+
+[provide]
+libjpeg = jpeg_dep
+