fix: disable libjpeg-turbo SIMD on riscv64 to avoid 3.1.4.1 build error

libjpeg-turbo 3.1.4.1 simdcoverage.c references jsimd_can_encode_mcu_AC_refine_prepare
which is only declared in the RVV SIMD extensions added to upstream main
(commit 9817c40) but not included in any stable release yet. Building
with -DWITH_SIMD=FALSE avoids the error; riscv64 has no production SIMD
support in 3.1.4.1 in any case.

Signed-off-by: Bruno Verachten <gounthar@gmail.com>

Author: gounthar

.github/workflows/wheels-dependencies.sh

@@ -267,6 +267,13 @@ function build {
     fi
     build_simple libxcb $LIBXCB_VERSION https://www.x.org/releases/individual/lib
 
+    # libjpeg-turbo 3.1.4.1 simdcoverage.c references riscv64 RVV SIMD
+    # functions that are only in upstream main and not yet released. Disable
+    # SIMD for riscv64 to avoid the build error; there is no production
+    # riscv64 SIMD support in this version anyway.
+    if [[ "$(uname -m)" == "riscv64" ]]; then
+        HOST_CMAKE_FLAGS="${HOST_CMAKE_FLAGS} -DWITH_SIMD=FALSE"
+    fi
     build_libjpeg_turbo
     if [[ -n "$IS_MACOS" ]]; then
         # Custom tiff build to include jpeg; by default, configure won't include