Cross-compile armv7l binaries for 32-bit Raspberry Pi's (#167)

Build arm binaries for 32-bit architecture.
Use patch based on https://github.com/curl/curl/pull/9054.

.github/workflows/build-and-test-make.yml

@@ -33,6 +33,11 @@ jobs:
             host: aarch64-linux-gnu
             capture_interface: eth0
             make: make
+          - os: ubuntu-20.04
+            arch: arm
+            host: arm-linux-gnueabihf
+            capture_interface: eth0
+            make: make
           - os: macos-11
             arch: x86_64
             host: x86_64-macos
@@ -55,10 +60,10 @@ jobs:
           # More dependencies for the tests
           sudo apt-get install tcpdump nghttp2-server libnss3
 
-      - name: Install Ubuntu dependencies (aarch64)
-        if: matrix.arch == 'aarch64'
+      - name: Install Ubuntu cross-compile dependencies (${{ matrix.arch }})
+        if: matrix.os == 'ubuntu-20.04' && matrix.arch != 'x86_64'
         run: |
-          sudo apt-get install gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
+          sudo apt-get install gcc-${{ matrix.host }} g++-${{ matrix.host }}
 
       - name: Install macOS dependencies
         if: matrix.os == 'macos-11'
@@ -177,7 +182,7 @@ jobs:
           ${{ matrix.make }} firefox-build
           ${{ matrix.make }} firefox-checkbuild
           ${{ matrix.make }} firefox-install
-    
+
       - name: Prepare the tests
         if: matrix.arch == 'x86_64'
         run: |
@@ -250,4 +255,4 @@ jobs:
         with:
           files: |
               ${{ env.release_file_lib }}
-              ${{ env.release_file_bin }}
+              ${{ env.release_file_bin }}

Makefile.in

@@ -225,6 +225,7 @@ else
 	    ;;                                     \
 	  *)                                       \
 	    use_64="0";                            \
+	    nspr_configure_flags="";               \
 	    ;;                                     \
 	esac
 

chrome/patches/curl-impersonate.patch

@@ -2485,3 +2485,17 @@ index 5ff86c7f5..be26f91ea 100644
    NV1(CURLOPT_TCP_NODELAY, 1),
    NV1(CURLOPT_PROXY_SSL_VERIFYPEER, 1),
    NV1(CURLOPT_PROXY_SSL_VERIFYHOST, 1),
+diff --git a/lib/easy_lock.h b/lib/easy_lock.h
+index 819f50ce8..1f54289ce 100644
+--- a/lib/easy_lock.h
++++ b/lib/easy_lock.h
+@@ -36,6 +36,9 @@
+ 
+ #elif defined (HAVE_ATOMIC)
+ #include <stdatomic.h>
++#if defined(HAVE_SCHED_YIELD)
++#include <sched.h>
++#endif
+ 
+ #define curl_simple_lock atomic_bool
+ #define CURL_SIMPLE_LOCK_INIT false

firefox/patches/curl-impersonate.patch

@@ -1354,7 +1354,7 @@ index cb162755d..13ee571aa 100644
 +
 +      case $host_cpu in
 +        arm)
-+          addlib="$addlib -larmv8_c_lib"
++          addlib="$addlib -larmv8_c_lib -l:libgcm-aes-arm32-neon_c_lib.a"
 +          ;;
 +        aarch64)
 +          addlib="$addlib -larmv8_c_lib -lgcm-aes-aarch64_c_lib"
@@ -1498,3 +1498,18 @@ index 706f0aac3..0ad94622e 100644
  endif
  
  # if unit tests are enabled, build a static library to link them with
+diff --git a/lib/easy_lock.h b/lib/easy_lock.h
+index 819f50ce8..1f54289ce 100644
+--- a/lib/easy_lock.h
++++ b/lib/easy_lock.h
+@@ -36,6 +36,9 @@
+ 
+ #elif defined (HAVE_ATOMIC)
+ #include <stdatomic.h>
++#if defined(HAVE_SCHED_YIELD)
++#include <sched.h>
++#endif
+ 
+ #define curl_simple_lock atomic_bool
+ #define CURL_SIMPLE_LOCK_INIT false
+