[PATCH] tests/tcg: Fix some targets default cross compiler path

[Philippe Mathieu-Daudé]

We do not want a shell command substitution, but a parameter
substitution (with assignment). Replace $() -> ${}, otherwise
the expanded command return an empty string and the $cross_cc
variable is not set.

Fixes: 634ef789f8e ("tests/tcg: add more default compilers to configure.sh")
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 tests/tcg/configure.sh | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/tests/tcg/configure.sh b/tests/tcg/configure.sh
index 1f985ccfc0c..b8574165fa6 100755
--- a/tests/tcg/configure.sh
+++ b/tests/tcg/configure.sh
@@ -46,7 +46,7 @@ fi
 : ${cross_cc_aarch64="aarch64-linux-gnu-gcc"}
 : ${cross_cc_aarch64_be="$cross_cc_aarch64"}
 : ${cross_cc_cflags_aarch64_be="-mbig-endian"}
-: $(cross_cc_alpha="alpha-linux-gnu-gcc")
+: ${cross_cc_alpha="alpha-linux-gnu-gcc"}
 : ${cross_cc_arm="arm-linux-gnueabihf-gcc"}
 : ${cross_cc_cflags_armeb="-mbig-endian"}
 : ${cross_cc_hexagon="hexagon-unknown-linux-musl-clang"}
@@ -55,17 +55,17 @@ fi
 : ${cross_cc_i386="i686-linux-gnu-gcc"}
 : ${cross_cc_cflags_i386="-m32"}
 : ${cross_cc_m68k="m68k-linux-gnu-gcc"}
-: $(cross_cc_mips64el="mips64el-linux-gnuabi64-gcc")
-: $(cross_cc_mips64="mips64-linux-gnuabi64-gcc")
-: $(cross_cc_mipsel="mipsel-linux-gnu-gcc")
-: $(cross_cc_mips="mips-linux-gnu-gcc")
+: ${cross_cc_mips64el="mips64el-linux-gnuabi64-gcc"}
+: ${cross_cc_mips64="mips64-linux-gnuabi64-gcc"}
+: ${cross_cc_mipsel="mipsel-linux-gnu-gcc"}
+: ${cross_cc_mips="mips-linux-gnu-gcc"}
 : ${cross_cc_ppc="powerpc-linux-gnu-gcc"}
 : ${cross_cc_cflags_ppc="-m32"}
 : ${cross_cc_ppc64="powerpc64-linux-gnu-gcc"}
 : ${cross_cc_ppc64le="powerpc64le-linux-gnu-gcc"}
-: $(cross_cc_riscv64="riscv64-linux-gnu-gcc")
+: ${cross_cc_riscv64="riscv64-linux-gnu-gcc"}
 : ${cross_cc_s390x="s390x-linux-gnu-gcc"}
-: $(cross_cc_sh4="sh4-linux-gnu-gcc")
+: ${cross_cc_sh4="sh4-linux-gnu-gcc"}
 : ${cross_cc_cflags_sparc="-m32 -mv8plus -mcpu=ultrasparc"}
 : ${cross_cc_sparc64="sparc64-linux-gnu-gcc"}
 : ${cross_cc_cflags_sparc64="-m64 -mcpu=ultrasparc"}
-- 
2.31.1