Fix MIPS build cflags

Accorading to GCC and Clang documents, march=mipsel/mips64el doesn't really exist. So we use real CPU arch instead, and apply '-EL' flag to indicate endianess. Also, to deal with link failure, we add '-mxgot' to increase GOT size. Change-Id: I21706da3423412c968f6e80a9d21f5266255a0cf Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41028Reviewed-by: Ben Clayton <bclayton@google.com> Reviewed-by: Alexis Hétu <sugoi@google.com> Tested-by: Ben Clayton <bclayton@google.com>

Fix MIPS build cflags
55275c35 · Jiaxun Yang · Ben Clayton · 683bad83 · 55275c35 · 55275c35
Commit 55275c35 authored Feb 09, 2020 by Jiaxun Yang Committed by Ben Clayton Feb 11, 2020
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Showing with 11 additions and 5 deletions

BUILD.gn BUILD.gn +7 -5

CMakeLists.txt CMakeLists.txt +4 -0

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--- a/BUILD.gn
+++ b/BUILD.gn
@@ -109,26 +109,28 @@ config("swiftshader_config") {
      ]
    } else if (target_cpu == "mipsel" && current_cpu == target_cpu) {
      cflags += [
-        "-march=mipsel",
+        "-EL",
        "-fPIC",
        "-mhard-float",
        "-mfp32",
+        "-mxgot",
      ]
      if (mips_arch_variant == "r1") {
        cflags += [
-          "-mcpu=mips32",
+          "-march=mips32",
        ]
      } else {
        cflags += [
-          "-mcpu=mips32r2",
+          "-march=mips32r2",
        ]
      }
    } else if (target_cpu == "mips64el" && current_cpu == target_cpu) {
      cflags += [
-        "-march=mips64el",
+        "-EL",
-        "-mcpu=mips64r2",
+        "-arch=mips64r2",
        "-mabi=64",
        "-fPIC",
+        "-mxgot",
      ]
    }

--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -475,15 +475,19 @@ else()
        set_cpp_flag("-mtune=generic")
    endif()
    if(ARCH STREQUAL "mipsel")
+        set_cpp_flag("-EL")
        set_cpp_flag("-march=mips32r2")
        set_cpp_flag("-fPIC")
        set_cpp_flag("-mhard-float")
        set_cpp_flag("-mfp32")
+        set_cpp_flag("-mxgot")
    endif()
    if(ARCH STREQUAL "mips64el")
+        set_cpp_flag("-EL")
        set_cpp_flag("-march=mips64r2")
        set_cpp_flag("-mabi=64")
        set_cpp_flag("-fPIC")
+        set_cpp_flag("-mxgot")
    endif()
    if(SWIFTSHADER_LESS_DEBUG_INFO)