Compile with soft floating point support

4 files changed, 132 insertions, 57 deletions

diff --git a/3-build-binutils.sh b/3-build-binutils.sh
index f3f6610..4d7eeeb 100644
--- a/3-build-binutils.sh
+++ b/3-build-binutils.sh
@@ -1,18 +1,44 @@
 #!/bin/sh
 source ./common
 
+options_do_configure=1
+options_do_build=1
+options_do_install=1
+
+if [ "$0" == "-i" ]; then
+  options_do_configure=
+  options_do_build=
+  options_do_install=1
+fi
+
 mkdir -p build/binutils-$binutils_ver
 cd build/binutils-$binutils_ver
-echo "Configuring binutils-${binutils_ver}"
-../../unpacked/binutils-$binutils_ver/configure --prefix=$prefix_dir --target=$target --disable-multilib >configure.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less configure.log; exit 1; fi
-echo "Building binutils-$binutils_ver"
-make -j$jobs >build.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less build.log; exit 1; fi
-echo "Installing binutils-$binutils_ver"
-make install >install.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less install.log; exit 1; fi
-echo Done with binutils-$binutils_ver
+if [ -n "$options_do_configure" ]; then
+  echo "Configuring binutils-${binutils_ver}"
+  ../../unpacked/binutils-$binutils_ver/configure \
+    --prefix=$prefix_dir \
+    --target=$target \
+    --disable-multilib \
+    --with-float=soft \
+    --enable-soft-float \
+    >configure.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less configure.log; exit 1; fi
+fi
+if [ -n "$options_do_build" ]; then
+  echo "Building binutils-$binutils_ver"
+  make -j$jobs >build.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less build.log; exit 1; fi
+fi
+if [ -n "$options_do_install" ]; then
+  echo "Installing binutils-$binutils_ver"
+  make install >install.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less install.log; exit 1; fi
+fi
+if [ -z "$options_do_configure$options_do_build$options_do_install" ]; then
+  echo "Nothing to be done for binutils-$binutils_ver"
+else
+  echo "Done with binutils-$binutils_ver"
+fi
diff --git a/4-build-gcc-stage-1.sh b/4-build-gcc-stage-1.sh
index cdcfe95..ab35497 100644
--- a/4-build-gcc-stage-1.sh
+++ b/4-build-gcc-stage-1.sh
@@ -1,39 +1,58 @@
 #!/bin/sh
 source ./common
 
+options_do_configure=1
+options_do_build=1
+options_do_install=1
+
+if [ "$0" == "-i" ]; then
+  options_do_configure=
+  options_do_build=
+  options_do_install=1
+fi
+
 ln -Tsfrv unpacked/mpc-$mpc_ver unpacked/gcc-$gcc_ver/mpc
 ln -Tsfrv unpacked/mpfr-$mpfr_ver unpacked/gcc-$gcc_ver/mpfr
 ln -Tsfrv unpacked/isl-$isl_ver unpacked/gcc-$gcc_ver/isl
 mkdir -p build/gcc-$gcc_ver
 cd build/gcc-$gcc_ver
-echo "Configuring gcc-${gcc_ver} (stage 1)"
-# See https://gist.githubusercontent.com/lirenlin/a40d4b510799fa31acba/raw/0b6d0bc74b21661f6cbbcfbda86b3fea25b5ce77/build-gcc.md
-../../unpacked/gcc-$gcc_ver/configure \
-  --prefix=$prefix_dir \
-  --target=$target \
-  --with-newlib \
-  --with-gnu-as \
-  --with-gnu-ld \
-  --enable-lto \
-  --enable-linker-build-id \
-  --disable-libmudflap \
-  --disable-libgomp \
-  --disable-libssp \
-  --disable-libstdcxx-pch \
-  --enable-multiarch \
-  --disable-multilib \
-  --enable-languages=c,c++ \
-  --with-headers=../../unpacked/newlib-$newlib_ver/newlib/libc/include \
-  --disable-shared \
-  >configure-stage-1.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less configure-stage-1.log; exit 1; fi
-echo "Building gcc-$gcc_ver (stage 1)"
-make -j$jobs all >build-stage-1.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less build-stage-1.log; exit 1; fi
-echo "Installing gcc-$gcc_ver (stage 1)"
-make install >install-stage-1.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less install-stage-1.log; exit 1; fi
-echo "Done with gcc-$gcc_ver (stage 1)"
+if [ -n "$options_do_configure" ]; then
+  echo "Configuring gcc-${gcc_ver} (stage 1)"
+  ../../unpacked/gcc-$gcc_ver/configure \
+    --prefix=$prefix_dir \
+    --target=$target \
+    --with-newlib \
+    --with-gnu-as \
+    --with-gnu-ld \
+    --enable-lto \
+    --enable-linker-build-id \
+    --disable-libmudflap \
+    --disable-libgomp \
+    --disable-libssp \
+    --disable-libstdcxx-pch \
+    --enable-multiarch \
+    --enable-soft-float \
+    --enable-languages=c,c++ \
+    --with-headers=../../unpacked/newlib-$newlib_ver/newlib/libc/include \
+    --disable-shared \
+    >configure-stage-1.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less configure-stage-1.log; exit 1; fi
+fi
+if [ -n "$options_do_build" ]; then
+  echo "Building gcc-$gcc_ver (stage 1)"
+  make -j$jobs all >build-stage-1.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less build-stage-1.log; exit 1; fi
+fi
+if [ -n "$options_do_install" ]; then
+  echo "Installing gcc-$gcc_ver (stage 1)"
+  make install >install-stage-1.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less install-stage-1.log; exit 1; fi
+fi
+if [ -z "$options_do_configure$options_do_build$options_do_install" ]; then
+  echo "Nothing to be done for gcc-$gcc_ver (stage 1)"
+else
+  echo "Done with gcc-$gcc_ver (stage 1)"
+fi
diff --git a/5-build-newlib.sh b/5-build-newlib.sh
index ddbc704..87cdc6f 100644
--- a/5-build-newlib.sh
+++ b/5-build-newlib.sh
@@ -2,18 +2,44 @@
 source ./common
 export PATH="$prefix_dir/bin:${PATH:+:${PATH}}"
 
+options_do_configure=1
+options_do_build=1
+options_do_install=1
+
+if [ "$0" == "-i" ]; then
+  options_do_configure=
+  options_do_build=
+  options_do_install=1
+fi
+
 mkdir -p build/newlib-$newlib_ver
 cd build/newlib-$newlib_ver
-echo "Configuring newlib-${newlib_ver}"
-../../unpacked/newlib-$newlib_ver/configure --prefix=$prefix_dir --target=$target >configure.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less configure.log; exit 1; fi
-echo "Building newlib-$newlib_ver"
-make -j$jobs >build.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less build.log; exit 1; fi
-echo "Installing newlib-$newlib_ver"
-make install >install.log 2>&1
-ret=$?
-if [ $ret -ne 0 ]; then less install.log; exit 1; fi
-echo "Done with newlib-$newlib_ver"
+if [ -n "$options_do_configure" ]; then
+  echo "Configuring newlib-${newlib_ver}"
+  CFLAGS_FOR_TARGET="-g -O2 -msoft-float -march=m4k" \
+    ../../unpacked/newlib-$newlib_ver/configure \
+    --prefix=$prefix_dir \
+    --target=$target \
+    --with-float=soft \
+    --enable-soft-float \
+    >configure.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less configure.log; exit 1; fi
+fi
+if [ -n "$options_do_build" ]; then
+  echo "Building newlib-$newlib_ver"
+  make -j$jobs >build.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less build.log; exit 1; fi
+fi
+if [ -n "$options_do_install" ]; then
+  echo "Installing newlib-$newlib_ver"
+  make install >install.log 2>&1
+  ret=$?
+  if [ $ret -ne 0 ]; then less install.log; exit 1; fi
+fi
+if [ -z "$options_do_configure$options_do_build$options_do_install" ]; then
+  echo "Nothing to be done for newlib-$newlib_ver"
+else
+  echo "Done with newlib-$newlib_ver"
+fi
diff --git a/Readme.md b/Readme.md
new file mode 100644
index 0000000..a5ed297
--- /dev/null
+++ b/Readme.md
@@ -0,0 +1,4 @@
+# Useful resources
+
+- https://gist.github.com/lirenlin/a40d4b510799fa31acba
+- https://sourceware.org/legacy-ml/newlib/2011/msg00349.html