A dedicated script to find the abiname

Author: kristjanvalur

.gitignore

@@ -53,6 +53,7 @@ dkms.conf
 
 # custom
 bin/
+tmp/
 gen_asm.s
 
 # Visual Studio noise
@@ -64,4 +65,7 @@ gen_asm.s
 
 # Allow our release libraries
 !lib/**/*.lib
-!lib/**/*.a
+!lib/**/*.a
+
+# vs code
+.vscode/

Makefile

@@ -11,7 +11,7 @@ CFLAGS += $(NO_CET)
 CXXFLAGS += $(NO_CET)
 
 # run c preprocessor with any cflags to get cross compilation result, then run regular compile in native
-ABI := $(shell mkdir -p bin; $(CC) -E $(CFLAGS) $(CPPFLAGS) -o bin/get_abi.c get_abi.c && $(CC) -o bin/get_abi bin/get_abi.c && bin/get_abi)
+ABI := $(shell ./abiname.sh "$(CC)" "$(CFLAGS)")
 ifndef ABI
 $(error Could not determine platform)
 else
@@ -34,7 +34,7 @@ lib:
 
 clean:
 	rm -f src/*.o tests/*.o
-	rm -f bin/*
+	rm -f bin/* tmp
 
 DEBUG = #-DDEBUG_DUMP
 

abiname.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+# this script compiles and runs src/abiname.c which merely prints
+# out the name of the abi.  This can be used by makefiles to identify
+# the correct library path to use to link the library
+# Instead of just compiling and running, we will use the provided compiler
+# and flags to just invoke the pre-processor.  We then use the default
+# compiler and linker to compile and link it.  This ensures that the 
+# script works in cross-compilation environments and can actually
+# run the provided code.
+set -eu
+here=$(dirname "$0")
+mkdir -p "${here}/tmp"
+tmp=$(mktemp "${here}/tmp/abinameXXX.c")
+
+#1 create the preprocessed file
+CC=${1:-cc}
+CFLAGS=${2:-}
+${CC} ${CFLAGS} -E -I "${here}/src" -o "${tmp}" "${here}/src/abiname.c"
+#2 compile resulting file
+cc -o "${tmp}.out" "${tmp}"
+#3 run it
+"${tmp}.out"