The mbedtls detection logic in curl is broken and resulted in build
paths leaking into curl-config and libcurl.pc.  Fix the detection by
looking for a symbol that wasn't removed in mbedtls 3.0 five years ago,
and remove the explicit sysroot reference as it is no longer needed.

Signed-off-by: Ross Burton <[email protected]>
---
 meta/recipes-support/curl/curl/mbedtls.patch | 11 +++++++++++
 meta/recipes-support/curl/curl_8.19.0.bb     |  3 ++-
 2 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-support/curl/curl/mbedtls.patch

diff --git a/meta/recipes-support/curl/curl/mbedtls.patch 
b/meta/recipes-support/curl/curl/mbedtls.patch
new file mode 100644
index 0000000000..fb69d304d0
--- /dev/null
+++ b/meta/recipes-support/curl/curl/mbedtls.patch
@@ -0,0 +1,11 @@
+Fix the mbedtls detection, mbedtls_havege_init was removed
+from mbedtls in the 3.0.0 release.
+
+Upstream-Status: Submitted [https://github.com/curl/curl/issues/21727]
+Signed-off-by: Ross Burton <[email protected]>
+
+--- a/m4/curl-mbedtls.m4       2026-05-22 13:09:00.344591549 +0100
++++ b/m4/curl-mbedtls.m4       2026-05-22 13:40:17.869454414 +0100
+@@ -45 +45 @@
+-      AC_CHECK_LIB(mbedtls, mbedtls_havege_init,
++      AC_CHECK_LIB(mbedtls, mbedtls_ssl_init,
diff --git a/meta/recipes-support/curl/curl_8.19.0.bb 
b/meta/recipes-support/curl/curl_8.19.0.bb
index b9251336b8..4287b7b7da 100644
--- a/meta/recipes-support/curl/curl_8.19.0.bb
+++ b/meta/recipes-support/curl/curl_8.19.0.bb
@@ -14,6 +14,7 @@ SRC_URI = " \
     file://run-ptest \
     file://disable-tests \
     file://no-test-timeout.patch \
+    file://mbedtls.patch \
 "
 
 SRC_URI:append:class-nativesdk = " \
@@ -56,7 +57,7 @@ PACKAGECONFIG[ldaps] = 
"--enable-ldaps,--disable-ldaps,openldap"
 PACKAGECONFIG[libgsasl] = "--with-libgsasl,--without-libgsasl,libgsasl"
 PACKAGECONFIG[libidn] = "--with-libidn2,--without-libidn2,libidn2"
 PACKAGECONFIG[libssh2] = "--with-libssh2,--without-libssh2,libssh2"
-PACKAGECONFIG[mbedtls] = 
"--with-mbedtls=${STAGING_DIR_TARGET},--without-mbedtls,mbedtls"
+PACKAGECONFIG[mbedtls] = "--with-mbedtls,--without-mbedtls,mbedtls"
 PACKAGECONFIG[mqtt] = "--enable-mqtt,--disable-mqtt,"
 PACKAGECONFIG[negotiate-auth] = 
"--enable-negotiate-auth,--disable-negotiate-auth"
 PACKAGECONFIG[nghttp2] = "--with-nghttp2,--without-nghttp2,nghttp2"
-- 
2.43.0

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